Rationalize the denominator. If any variables are present, assume that they represent nonnegative numbers, and assume that the denominator is not zero.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Simplify. Write your answers in the form of a+bi, where a and b are real numbers.
A. 
B. 
- 
i
C. 
+ 
i
D. 
i
Mathematics
Find the sum of the series by recognizing how it is related to something familiar.x - 6x2 + 
- 
+ . . .
A. ex ln(1 + 6x) B. -xe6x C. xe-6x D. e6x + e-6x
Mathematics
Use the total differential dz to approximate the change in z as (x, y) moves from P to Q. Then use a calculator to find the corresponding exact change ?z (to the accuracy of your calculator).ln (xy2); P(5, -1), Q(4.95, -.99)
A. dz = 0.03; ?z = 0.0301510076 B. dz = -0.3; ?z = -0.301510076 C. dz = 0.3; ?z = 0.301510076 D. dz = -0.03; ?z = -0.0301510076
Mathematics
Solve the equation for the indicated variable.
= 5 for x
A. b - a + 5 B. 5a + b C. 5a + ab D. a + b + 5
Mathematics