Solve the problem.Find the sum of the series 
by expressing 
as a geometric series, differentiating both sides of the resulting equation with respect to x, and replacing x by 
.
A. 
B. 
C. 
D. 4
Answer: C
Mathematics
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Write a description of the shaded region using the symbols A, B, C, ?, ?, -, and ' as needed.
A. A ? C B. B' ? A ? C C. A ? C - B D. C ? B' ? A
Mathematics
Find the derivative.f(x) = cos e3x
A. e3x cos e3x B. 3e3x sin e3x C. -3 sin e3x D. -3e3xsin e3x
Mathematics
Simplify the complex rational expression.
A. 7 - a2
B. 
C. 
D. 
Mathematics
Find the perimeter of each figure. For Exercise 29, find the area also.
A. area: 
ft2; perimeter: 1
ft
B. area: 
ft2; perimeter: 1
ft
C. area: 
in2; perimeter: 1
in
D. area: 
ft2; perimeter: 
ft
Mathematics