Rationalize the numerator. Assume all variables represent positive numbers.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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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, multiplying both sides by x, differentiating again, and replacing x by 
.
A. 
B. 
C. 
D. 
Mathematics
Multiply and write the result in standard form.(4 + 7i)(3 + 6i)
A. 42i2 + 45i + 12 B. -30 - 45i C. 54 - 3i D. -30 + 45i
Mathematics
Determine whether or not the function is one-to-one.{(9, -4), (10, -4), (11, -2), (12, -3)}
A. Yes B. No
Mathematics
Divide, if possible.
A. 
B. -3
C. -7
D. 7
Mathematics