If g(x) = x2 + 4x with x ā‰„ āˆ’2, find gāˆ’1(5).

label Algebra
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Sep 25th, 2017

Answer:

Since your function g(x) is a bijective function in the defined domain, the I can write:

x^2+4x=-5

whose solutions are:

x= 1 whic belongs to the domain of g8x)

and:

x = -5, which doesn't belong to the domain of g(x)

so your answer is:

g^-1(5) = 1

Feb 28th, 2015

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