Evaluate the expression by hand. Variables represent any real number.
A. ± x4
B. x8
C. x4
D. ± x16
Answer: C
Mathematics
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Determine where the given function is concave up and where it is concave down. f(x) = 7x - x3
A. Concave up on (0, ?), concave down on (-?, 0) B. Concave down for all t C. Concave up on (-?, 0), concave down on (0, ?) D. Concave up on (-?, 0) and (1, ?), concave down on (0, 1)
Mathematics
Find the product of the two binomials.
A. 
x2 + 21
B. 
x2 - 
x + 21
C. 
x2 - 21
D. 
x2 + 
x - 21
Mathematics
Solve the equation for x.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Mathematics
Simplify the exponential expression.6x-6y2
A. 
B. 
C. 
D. 
Mathematics