Let f(x) = −5x5 + 7x2 + 9x − 1. Find the slope of the graph at x = 2, that is f′(2).
Derivatives worksheet with answers
1.Easy
f(x) = −5x5 + 7x2 + 9x − 1x = 2
f′(2) =
2.Easy
Let f(x) = 2x5 + 2x2 − 7x + 6. Find the slope of the graph at x = 1, that is f′(1).
f(x) = 2x5 + 2x2 − 7x + 6x = 1
f′(1) =
3.Medium
Let f(x) = x·sin(3x), with x in radians. Find f′(0.5).
f(x) = x·sin(3x)x = 0.5 rad
f′(0.5) =
4.Medium
Let f(x) = ln(3x2 + 5). Find f′(−2).
f(x) = ln(3x2 + 5)x = −2
f′(−2) =
5.Hard
The tangent line to f(x) = 2x2 + 5x at x = 1 crosses the y-axis at y = b. Find b.
f(x) = 2x2 + 5xx = 1
b =
6.Hard
The tangent line to f(x) = 2x2 + 5x at x = 3 crosses the y-axis at y = b. Find b.
f(x) = 2x2 + 5xx = 3
b =
Answer key
- 1. f′(2) = −363
- 2. f′(1) = 7
- 3. f′(0.5) = 1.104
- 4. f′(−2) = −0.7059
- 5. b = −2
- 6. b = −18
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