how do you generally solve a related rates problem?
Front
1. define what I need and what other rates I have
2. draw a picture
3. figure out the "general formula"
4. derive implicitly
5. substitute and solve
6. don't forget units.
Back
how do you find critical numbers?
Front
find when f'(x)=0 or when f'(x)=DNE
Back
in simplified terms, what is the second derivative test?
Front
1. find the points when f'(x)=0
2. plug those x values into f''(x)
3. f'' is positive then there is a local minimum and if f'' is negative then there local maximum
Back
what is an absolute minimum?
Front
the smallest value of f(x) in the domain of the function
Back
what are the absolute maximum and minimum considered to be?
Front
extreme values
Back
what is a local or relative maximum?
Front
the largest value of f(x) on some open interval in the domain of a function
Back
what is the extreme value theorem?
Front
if f is continuous over a closed interval, then fa has a maximum and minimum value over that interval
Back
what is Rolle's theorem?
Front
if f has a local maximum or minimum at c, and if f'(c) exists, then f'(c)=0
Back
when is f(x) decreasing?
Front
when f'(x) < 0
Back
how do you do la' hospital's rule?
Front
1. show that that the limit numerator and denominator separately equal what they need to equal
2. say "by la' hospital
3. show the limit of the derivative of the numerator over the derivative of the denominator
4. may have to do in more than once if it continues to not work
Back
what are the general steps for doing an optimization problem?
Front
1. figure out 'main' equation
2. make that equation in terms of one variable
3. derive
4. solve for minimum or maximum value by setting equal to 0
4. check with a sign chart
Back
how to solve a related rates problem that involves a cone?
Front
1. draw a labeled diagram of the cone
2. use similar triangle ratios and set equal in terms of r
3. derive the volume a cone formula
4. plug in and solve
Back
what is the second derivative test?
Front
-if f'(c)=0 and f''(c) is positive (concave up), then f has a local minimum at c
-if f'(c)=0 and f''(c) is negative (concave down), then f has a local maximum at c
Back
when is f(x) concave down?
Front
when f''(x) < 0
Back
what are the steps of doing an optimization problem with distance and closest points?
Front
1. write distance formula
2. x1,y1 is the point is give you
3. x2,y2 is x, what y equals
4. plug in points
5. use calc to find zeros of derivative
6. plug zero in to original equation to find point
Back
when does f(x) have a local min?
Front
when f'(x) = 0 and when f'(x) changes from negative to positive
Back
what are local maximums and minimums considered to be?
Front
critical numbers because rolle's theorem states that if the slope of the local max. or min. exists then then the slope at that local max. or min equals 0
Back
what is an absolute maximum?
Front
the largest value of f(x) in the domain of the function
Back
what is the mean value theorem?
Front
if f is a differentiable (which also would make it continuous) function on the interval [a,b], then there exists a number c between a and b such that
Back
when does f(x) have a point of inflection?
Front
f(x) has an inflection point when f''(x) = 0 and when f''(x) changes sign
Back
what is the first derivative test?
Front
-if f' changes from positive to negative at c, then f has a local maximum at c
-if f' changes from negative to positive at c, then f has a local minimum at c
-if f' doesn't change sign at c, then f' has no local maximum or minimum
Back
what is a local or relative minimum?
Front
the smallest value of f(x) on some open interval in the domain of a function
Back
in simplified terms, what is the first derivative test?
Front
1. take the derivative of the function
2. find when f'(x)=0
3. use a sign chart to find the intervals of increase and decrease
Back
when can you solve a limit with la hospital's rule?
Front
when the limits of both the numerator and denominator equal 0, negative infinity, or positive infinity when the limit of the numerator is equal to the limit of only the denominator (with indeterminate forms)
Back
how do you find absolute maximum and minimum?
Front
1. find the coordinates of the endpoints
2. find the coordinates of the local maximums and minimums
3. decide absolute maximum and minimum
Back
what is a critical number?
Front
a number c in the domain of f such that either f'(c) = 0 or f'(c) does not exist
Back
when is f(x) increasing?
Front
when f'(x) > 0
Back
what are indeterminate forms?
Front
limits that may or may not exist
Back
when does f(x) have a local max?
Front
when f'(x) = 0 and when f'(x) changes from positive to negative
Back
when is f(x) concave up?
Front
when f''(x) > 0
Back
how do you find the absolute max and absolute min?
Front
plug in the local max and local min to original equation to see which local max has largest f(x) value and which local min has smallest f(x) value