Let f(x) = x3 + 2x2 + 2x − 1. Find the slope of the graph at x = −2, that is f′(−2).
Derivatives worksheet with answers
1.Easy
f(x) = x3 + 2x2 + 2x − 1x = −2
f′(−2) =
2.Easy
Let f(x) = x4 − 3x2 + x + 6. Find the slope of the graph at x = −2, that is f′(−2).
f(x) = x4 − 3x2 + x + 6x = −2
f′(−2) =
3.Medium
Let f(x) = x3·e−x. Find f′(2).
f(x) = x3·e−xx = 2
f′(2) =
4.Medium
Let f(x) = x2·e−x. Find f′(1.5).
f(x) = x2·e−xx = 1.5
f′(1.5) =
5.Hard
The tangent line to f(x) = x2 + 3x + 6 at x = 1 crosses the y-axis at y = b. Find b.
f(x) = x2 + 3x + 6x = 1
b =
6.Hard
The tangent line to f(x) = 3x2 + x at x = −1 crosses the y-axis at y = b. Find b.
f(x) = 3x2 + xx = −1
b =
Answer key
- 1. f′(−2) = 6
- 2. f′(−2) = −19
- 3. f′(2) = 0.5413
- 4. f′(1.5) = 0.1673
- 5. b = 5
- 6. b = −3
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