Let f(x) = x3 + 7x2 − 6x − 7. Find the slope of the graph at x = −1, that is f′(−1).
Derivatives worksheet with answers
1.Easy
f(x) = x3 + 7x2 − 6x − 7x = −1
f′(−1) =
2.Easy
Let f(x) = −2x5 − 9x2 + 2x − 2. Find the slope of the graph at x = −3, that is f′(−3).
f(x) = −2x5 − 9x2 + 2x − 2x = −3
f′(−3) =
3.Medium
Let f(x) = x·sin(x), with x in radians. Find f′(2).
f(x) = x·sin(x)x = 2 rad
f′(2) =
4.Medium
Let f(x) = x3·e−0.5x. Find f′(1).
f(x) = x3·e−0.5xx = 1
f′(1) =
5.Hard
The tangent line to f(x) = x2 + 3x + 3 at x = 2 crosses the y-axis at y = b. Find b.
f(x) = x2 + 3x + 3x = 2
b =
6.Hard
Let f(x) = x3 + 3x2 + 3. Find the x-coordinate x of the local maximum.
f(x) = x3 + 3x2 + 3
x =
Answer key
- 1. f′(−1) = −17
- 2. f′(−3) = −754
- 3. f′(2) = 0.077
- 4. f′(1) = 1.516
- 5. b = −1
- 6. x = −2
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