Find the convergence set for the given power series. Hint: First find a formula for the nth term; then use the Absolute Ratio Test.
+ 
+ 
+ 
+ . . .
A. 2 ? x < 4
B. -1 ? x < 1
C. 0 < x < 3
D. All x
Answer: A
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A. 756 B. 36 C. 1728 D. 144
Solve the problem.Barry Newman's savings account has a balance of $4239. After 20 years, what will the amount of interest be at 5% compounded annually?
A. $6999.33 B. $7008.33 C. $7013.33 D. $2119.50
For the function f, construct and simplify the difference quotient 
.f(x) = 
A. - 
B. 
C. 
D. 
Solve the problem.The formula y = 
models the relationships needed to focus an image where y is the distance between the film and projector lens, x is the distance between the move screen and the projector lens, and f is the focal length. a) Sketch the graph of this rational function for f = 5 centimeters. 
b) Bob and Carol are showing home movies. Use the graph to describe the desired distance between the film and the projector lens as Carol moves the projector further from the screen.
What will be an ideal response?