If the function is one-to-one, find its inverse. If not, write "not one-to-one."f(x) = 6x3 + 4

A. not a one-to-one
B. f-1(x) = 
C. f-1(x) =   - 4 
D. f-1(x) = 


Answer: D

Mathematics

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A PDF for a continuous random variable X is given. Use the PDF to find the indicated probability.Find P(27 ? X ? 42).f(x) = 

A.
B.
C.
D.

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Choose the equivalent expression for the given expression.cos2x

A. 1 -  sec2x  B. 1 -  sin2x  C. 1 +  sin2x  D. sin2x - 1

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Simplify.

A. b
B.
C.
D.

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Use the laws of exponents to simplify each expression using positive exponents only. Assume all variables represent nonzero real numbers.(-7x3y4)2

A. 49x5y6 B. -49x6y8 C. 49x6y8 D. -7x6y8

Mathematics