Let f(x) = −5x3 + 3x2 − 3x + 1. Find the slope of the graph at x = 2, that is f′(2).
Derivatives worksheet with answers
1.Easy
f(x) = −5x3 + 3x2 − 3x + 1x = 2
f′(2) =
2.Easy
Let f(x) = −x3 + 4x2 − 3x + 2. Find the slope of the graph at x = −2, that is f′(−2).
f(x) = −x3 + 4x2 − 3x + 2x = −2
f′(−2) =
3.Medium
Let f(x) = ln(x2 + 5). Find f′(3).
f(x) = ln(x2 + 5)x = 3
f′(3) =
4.Medium
Let f(x) = (2x − 3)4. Find f′(0).
f(x) = (2x − 3)4x = 0
f′(0) =
5.Hard
Let f(x) = x3 − 13.5x2 + 54x. Find the x-coordinate x of the local maximum.
f(x) = x3 − 13.5x2 + 54x
x =
6.Hard
The tangent line to f(x) = 0.5x2 + 2x + 5 at x = 2 crosses the y-axis at y = b. Find b.
f(x) = 0.5x2 + 2x + 5x = 2
b =
Answer key
- 1. f′(2) = −51
- 2. f′(−2) = −31
- 3. f′(3) = 0.4286
- 4. f′(0) = −216
- 5. x = 3
- 6. b = 3
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