Find the domain of the function.y = 
A. [-7, ?)
B. (-?, ?)
C. (-?, 
D. [0, ?)
Answer: A
Mathematics
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Simplify the difference quotients 
and 
for the following function. Rationalize the numerator when necessary.f(x) = 
A. 
; 
B. - 
; - 
C. 
; 
D. - 
; - 
Mathematics
Multiply the complex numbers and simplify powers of i.
2
A. - 
B. -i
C. i
D. 
Mathematics
Use the graph of a known basic function and a horizontal stretch or horizontal compression to sketch the function.h(x) = 
A. 
B. 
C. 
D. 
Mathematics
Find the exact value of the expression.cos 
cos 
- sin 
sin 
A. 0
B. 1
C. -1
D. 
Mathematics