Find the sum or difference.2(-2r4 + 9r3 - 3r) - 3(8r4 - 9r3 + 6r2 - 2r)
A. -28r4 + 6r2 - 5r
B. -28r4 + 18r3 - 6r2 - r
C. -28r4 + 45r3 -18r2
D. -28r4 - 9r3 + 18r2 - 12r
Answer: C
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Compare the right-hand and left-hand derivatives to determine whether or not the function is differentiable at the point whose coordinates are given.
y = xy = 2x
A. Since limx?0+ f '(x) = 1 while limx?0- f '(x) = 2, f(x) is not differentiable at x = 0. B. Since limx?0+ f '(x) = 2 while limx?0- f '(x) = 1, f(x) is not differentiable at x = 0. C. Since limx?0+ f '(x) = -2 while limx?0- f '(x) = -1, f(x) is not differentiable at x = 0. D. Since limx?0+ f '(x) = 1 while limx?0- f '(x) = 1, f(x) is differentiable at x = 0.
Find all the factors of the number.84
A. 1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 14, 21, 28, 42, 84 B. 1, 2, 3, 4, 6, 7, 12, 14, 21, 42, 84 C. 1, 2, 3, 4, 7, 14, 21, 28, 42, 84 D. 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84
Perform the indicated operation.7x2(8x7 - 4x4 - 11)
A. 56x9 - 4x4 - 11 B. 56x9 - 28x6 - 77x2 C. 56x7 - 28x4 - 77 D. 56x9 - 28x6
Find the requested value.f(x) = x + 2, g(x) = 4x2 + 18x + 6Find (fg)(-4).
A. 4 B. -420 C. 100 D. 12