Let f(x) = 2x3 − 8x2 + 2x + 1. Find the slope of the graph at x = −3, that is f′(−3).
Derivatives worksheet with answers
1.Easy
f(x) = 2x3 − 8x2 + 2x + 1x = −3
f′(−3) =
2.Easy
Let f(x) = 2x5 − 5x2 − 5x − 2. Find the slope of the graph at x = −2, that is f′(−2).
f(x) = 2x5 − 5x2 − 5x − 2x = −2
f′(−2) =
3.Medium
Let f(x) = x3·e2x. Find f′(1).
f(x) = x3·e2xx = 1
f′(1) =
4.Medium
Let f(x) = x·sin(3x), with x in radians. Find f′(1).
f(x) = x·sin(3x)x = 1 rad
f′(1) =
5.Hard
Let f(x) = x3 − 12x2 + 36x − 3. Find the x-coordinate x of the local minimum.
f(x) = x3 − 12x2 + 36x − 3
x =
6.Hard
Let f(x) = x3 + 10.5x2 + 36x. Find the x-coordinate x of the local maximum.
f(x) = x3 + 10.5x2 + 36x
x =
Answer key
- 1. f′(−3) = 104
- 2. f′(−2) = 175
- 3. f′(1) = 36.95
- 4. f′(1) = −2.829
- 5. x = 6
- 6. x = −4
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