Let f(x) = −5x5 − 5x2 − 3x + 1. Find the slope of the graph at x = 3, that is f′(3).
Derivatives worksheet with answers
1.Easy
f(x) = −5x5 − 5x2 − 3x + 1x = 3
f′(3) =
2.Easy
Let f(x) = x5 − 3x2 − 4x + 1. Find the slope of the graph at x = 2, that is f′(2).
f(x) = x5 − 3x2 − 4x + 1x = 2
f′(2) =
3.Medium
Let f(x) = ln(2x2 + 2). Find f′(2).
f(x) = ln(2x2 + 2)x = 2
f′(2) =
4.Medium
Let f(x) = (4x + 5)4. Find f′(−1).
f(x) = (4x + 5)4x = −1
f′(−1) =
5.Hard
The tangent line to f(x) = 2x2 + 4 at x = −2 crosses the y-axis at y = b. Find b.
f(x) = 2x2 + 4x = −2
b =
6.Hard
Let f(x) = x3 − 7.5x2 + 12x − 2. Find the x-coordinate x of the local maximum.
f(x) = x3 − 7.5x2 + 12x − 2
x =
Answer key
- 1. f′(3) = −2058
- 2. f′(2) = 64
- 3. f′(2) = 0.8
- 4. f′(−1) = 16
- 5. b = −4
- 6. x = 1
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