Find the derivative.f(x) = -4x4 + 8x - 5
A. -4x3 + 8x - 5
B. -4x3 + 8
C. -16x3 + 8x - 5
D. -16x3 + 8
Answer: D
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Answer the question.Which of the following statements is false?
A. The series 
must have no negative terms in order for the Direct Comparison test to be applicable.
B. The sequences {an} and {bn} must be positive for all n to apply the Limit Comparison Test.
C. If {an} and {bn} meet the conditions of the Limit Comparison test, then, if 
=0 and 
converges, then 
converges.
D. All of these are true.
Solve.What is the maximum product of two positive numbers whose sum is 6?
A. 9 B. 1.5 C. 18 D. 3
Multiply.0.4957 × 100
A. 4.957 B. 495.7 C. 0.495700 D. 49.57
Find the cross-product and determine whether the proportion is true or false.
= 
A. 
? 224; false
B. 28 = 28; true
C. 12 = 12; true
D. 32 ? 49; false