Determine the indefinite integral.
A. sech x tanh x + C
B. tanh2 x + C
C. 
+ C
D. sech2 x + C
Answer: C
Mathematics
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Solve the problem.License plates are made using 2 letters followed by 2 digits. How many plates can be made if repetition of letters and digits is allowed?
A. 10,000 B. 456,976 C. 6760 D. 67,600
Mathematics
Use the square root property to solve the equation.3x2 + 21 = 0
A. {-i
, i
}
B. {-7i, 7i}
C. {-7, 7}
D. {-
, 
}
Mathematics
Decide whether the pair of lines is parallel, perpendicular, or neither.The line through (-20, 5) and (-4, 7) and the line through 
and 
A. Perpendicular B. Parallel C. Neither
Mathematics
For the given functions f and g, find the requested composite function value.f(x) = 
, g(x) = 9x - 6;
Find (f ? g)(1).
A. 48 B. 78 C. 30 D. 18
Mathematics