Monday, September 20, 2010

Week 4 Prompt

What are the different keywords that indicate taking a derivative? Give examples of direction sets that tell you they want a derivative.

12 comments:

  1. What are the different keywords that indicate taking a derivative?


    There are key expressions that indicate taking a derivative which are :

    dy/dx

    y ’

    f ’(x)

    d/dx

    d/dx [f(x)]

    Dx [y]


    There are also key phrases that indicate taking a derivative which are:

    Slope of a tangent line

    Speed

    Velocity

    Acceleration

    Rate of Change (( something per something))




    Give examples of direction sets that tell you they want a derivative.

    Ex: 1 “Find the slope of a tangent line when…”

    Ex:2 “Find the slope of a curve at a given point…”

    Ex:3 “Find the speed”

    Ex:4 “Find the acceleration”

    Ex: 5 “Find the velocity”

    Ex: 6 ((when asked for any rate of change)) [i.e. cars per minute, gallons per hour, tickets sold per hour etc..]

    Ex: 7 When specifically asked to “find dy/dx”

    Ex: 8 When specifically asked to “find y ’ ”

    Ex: 9 When specifically asked to “find f ’(x)”

    Ex: 10 When specifically asked to “find d/dx”

    Ex: 11 When specifically asked to “find d/dx [f
    (x)]”

    Ex: 12 When specifically asked to “find
    Dx [y]”

    Ex: 13 “Find the derivative of”

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  2. The different keywords that indicate taking a derivative are:
    * d/dx = derivative
    * dx/dy = derivative
    * Dx = derivative
    * y’ = derivative of y
    * f’(x) = derivative of f(x)
    * slope of a tangent line = derivative
    * slope of a horizontal tangent line = take the derivative then set equal to 0
    * equation of a tangent line = take the derivative then plug it and the given point into a point-slope equation
    * rate of change = derivative
    * velocity = derivative
    * instantaneous velocity = derivative
    * acceleration = take the derivative twice

    Examples of directions:
    * “Take the derivative of…”
    * “Find the slope of a tangent line when…”
    * “Find the slope of a horizontal tangent line when…”
    * “Find the slope of a curve at…”
    * “Find the equation of a tangent line when…”
    * “What is the velocity when…”
    * “Find the instantaneous velocity when…”
    * “Find the acceleration when…”
    * “Find the rate of change when…”

    ReplyDelete
  3. To begin, I will explain what the definition of a derivative is, before giving the example ways to write it. A derivative is a slope of a tangent line, slope of a curve at a point, or the rate of change. There are several ways to represent a derivative, and each way could be used when doing certain problems. Derivatives are also used in rules along with representing things. Derivatives are also used in the quotient rule, product rule, chain rule, power rule, and trig functions.
    -----------------------------------
    Key words: (When you see these words you know to find a derivative)
    Velocity
    Tangent slope line
    Rate of change
    Speed
    Acceleration
    **Out of the three at the top you will usually see two of them in application problems.
    (Velocity and Rate of change)

    The derivative of trig functions:
    Tan x= sec^2x
    Csc x= -cscxcotx
    Cot x= csc^2
    Sec x= secxtanx

    Examples and Expressions:
    -All of them mean find the derivative
    Dy/dx, y’, y”, y”’, ect., f’(x), g’(x), d/dx, [f(x)], Dx[y]

    ReplyDelete
  4. The functions indicating a derivative include:
    dy/dx; y'; f'(x); [f(x)]; Dx[y]; d/dx
    ^All these things are telling you to take the derivative. It's just showing it in a simpler form.
    So for example if the directions said---Find f'(c) when c=1. This means to find the derivative of the equation given to you and then plug in 1 after.
    Some words indicating a derivative include:
    *slope of the tangent line
    *rate of change (acceleration-2 d/dx's, velocity)
    *equation of the tangent line-take derivative , then use point and slope in point-slope formula y2-y1=m(x2-x1) to get equation
    *slope of a horizontal tangent line-take derivative, set it equal to zero and solve for x.
    *find the slope of the graph of the function at the given point-means to take the derivative of the function then plug the x-value of the point into the derivative
    *f'(x)-1st derivative
    *f''(x)-2nd derivative
    *f'''(x)-3rd derivative
    *find the derivative by the limit process-take the derivative THE LONG WAY. (with the delta x's)
    *find f'(x) using the deffinition of a derivative-also means to take the derivative the LONG WAY.

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  5. What are the different keywords that indicate taking a derivative?

    There are many different keywords that indicate or notate taking a derivative of a function, all including:

    dy/dx, y'(prime), f'(x) (f prime of x), d/dx[f(x)], Dx[y]


    Give examples of direction sets that tell you they want a derivative.

    When a textbook or the AP asks you to find a derivative, there are many ways that "taking it" or finding it can be asked to you. You just have to be familiar with the different ways in order to find a derivative in every possible situation.

    -Find the derivative (of course, lol)
    -slope of a tangent line
    -slope of a curve (at a point)
    -find the rate of change
    -find the slope of the graph (find derivative, then plug in x)
    -instantaneous velocity


    Once again, taking the derivative of a function has many ways to do it. You just have to be familiar with the way books word it, in order to find or "take" the derivative correctly.

    ReplyDelete
  6. there are numerous keywords used when taking a derivative:

    f'(x)
    dy/dx
    y'
    d/dx [f(x)]
    Dx[y]

    there are also various meanings of derivatives; they could mean:

    find slope of a tangent line
    find slope of a curve
    find rate of change
    find the slope of the graph
    find instantaneous velocity
    find acceleration
    and of course, just find the derivative ._.;

    although there are many phrases used to ask "find the derivative..." they all point towards the same idea, and some are slightly more specific than others. recognizing the notation is key to what the question is asking of you

    ReplyDelete
  7. There are several ways the book will ask you that means "take the derivative" i guess its to slip you up or just to be jerks haha

    Examples:

    if f(x)=# f'(x)=? take the derivative
    y'
    dy/dx
    find the slope of the tangent line
    find the slope of the curve
    rate of change
    instantaneos velocity
    Dx(y)

    basically, if you see an apostrophe or dx anywhere before the equation, you should know that you need to take a derivative

    ReplyDelete
  8. What are the different keywords that indicate taking a derivative?


    The key expressions that indicate taking a derivative are:

    dy/dx

    y ’

    f’(x)

    d/dx

    d/dx [f(x)]

    Dx [y]


    The key phrases that indicate taking a derivative:

    Slope of a tangent line

    Speed

    Velocity

    Acceleration

    Rate of Change (( something per something))




    Give examples of direction sets that tell you they want a derivative:

    1. -Find the slope of a tangent line when…

    2. -Find the slope of a curve at a given point…

    3. -Find the speed

    4. -Find the acceleration

    5. -Find the velocity

    6. -when asked for any rate of change
    i.e. cars per minute or gallons per hour

    7. -When specifically asked to find dy/dx

    8. When specifically asked to find y ’(x)

    9. When specifically asked to find f ’(x)

    10. When specifically asked to find d/dx

    11. When specifically asked to find d/dx [f
    (x)]

    12. When specifically asked to find
    Dx [y]

    13. Find the derivative of...

    ReplyDelete
  9. dy/dx, y ’, f ’(x), d/dx, d/dx [f(x)], and Dx [y] are all notations used to show that a problem is asking you to find a derivative.

    different terms used to ask for derivatives are slope of a tangent line, acceleration, speed, velocity, rate of change, and occasionally gravity on the moon.

    ReplyDelete
  10. Some different notations are:
    dy/dx
    y'
    f'(x)
    dx(y)
    d/dx[f(x)]
    slope of a tangent line
    velocity
    speed
    acceleration
    rate of change

    Directions could be:
    Find the f'
    Find the dy/dx
    etc.

    What is the slope of the tangent line through the point (x,y) for equation n+1?

    Find the slope of the curve at (x,y).

    Find the speed.

    Find the velocity.

    Find the acceleration.

    Find the rate of change.

    And many, many more wordings.

    ReplyDelete
  11. The keywords and forms of equations for finding a derivative are:

    dy/dx

    y’

    f’(x)

    d/dx

    d/dx (f(x)

    Dx (y)

    Slope

    Speed

    Velocity

    Acceleration

    Any kind of ratio

    Ex. y'x

    Ex. Dx(2x)

    Ex. Find the speed of ....

    Ex. Find the slope of the tangent line at ....

    Ex. Find the amount of ....... per ......

    ReplyDelete
  12. what is this.....I don't even.....

    well, I think I might say that there's a bunch of ways to signal derivatives:

    dy/dx

    d/dx

    y'

    f'(x)

    d/d(x) f(x)

    Dx (y)

    now, there's a number of terms and whatnot that help you figure out that you need to find a derivative:

    Slope

    Speed

    Velocity

    Acceleration

    Tangent line

    Secant line

    Herp-Derp

    DERIVE

    DERIVATIVE

    FIND THE DERIVATIVE

    slope of a Tangent Line

    rate of change

    and numerous other terms

    now, here's a few examples of situations where you have to find the derivatives:

    y'x

    Dx(4x)

    Find the speed

    Find the slope of tangent line ***** at (x,y).

    Find the rate of change

    Find the speed

    Find the acceleration

    Find the slope of the Secant line

    and a whole bunch of other examples

    sadly, derivatives shall be the death of me

    ReplyDelete