Find the common ratio r for the given infinite geometric sequence.
, 
, 
, 
, 
, . . .
A. 4
B. 12
C. 10
D. 
Answer: A
Mathematics
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Evaluate the integral.
dx
A. 
cot4 x + C
B. 
cot2 x + ln 
+ C
C. 
cot4 x sec x + C
D. - 
cot2 x - 
ln 
+ C
Mathematics
Multiply and reduce to lowest terms.
? 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Suppose that 
= 3. Find 
and 
.
A. 27; 
B. 12; 3
C. 27; -3
D. 9; -3
Mathematics
Perform the row operations on the matrix and write the resulting matrix.Replace R2 by 
R1 + 
R2
A. 
B. 
C. 
D. 
Mathematics