Which of the following is a correct substitution for the integral 
?
A. u = ln x; 
B. u= ln x; 
du
C. u = 
; 
D. u = ln x; 
E. u = ln x; 
Answer: D
Mathematics
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< 4
A. 
B. 
C. 
D. 
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Find the midpoint of the line segment whose endpoints are given.(4, -8), (0, 4)
A. 
B. (4, -12)
C. 
D. (4, -4)
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Add or subtract. Write the answer in lowest terms.
+ 
A. 
B. 
C. 
D. 
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Evaluate. Assume that all variables represent nonzero real numbers.z0
A. z B. 0 C. -1 D. 1
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