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If f(x)=-2x-5 and g(x)=x^4, what is (g°f)(-4)?

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  • If f(x)=-2x-5 and g(x)=x^4, what is (g°f)(-4)?


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Answer #1 | 16/02 2017 04:46
Same as g(f(-4)) To find f(-4), plug -4 into f(x). To find g(f(-4)), take the result of f(-4) and plug it into g(x). What step is confusing you here?
Answer #2 | 16/02 2017 04:19
A very hard question.
Answer #3 | 16/02 2017 12:25
g [ f (x) ] = g [ -2x - 5 ] = (-1)^4 [ 2x - 5 ]^4 g [ f (- 4) ] = [ -13 ]^4 g [ f (- 4) ] = 28561
Answer #4 | 16/02 2017 05:21
f(x) = -2x - 5 g(x) = x^4 (g°f)(-4) = 256(3) = 768

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