Q. Let g(x)=8x−5. Which of the following is equivalent to g(g(x)) ?Choose 1 answer:(A) 64x−10(B) 64x−45(C) 64x2+25(D) 64x2−80x+25
Understanding composition of functions: Understand the composition of functions.To find g(g(x)), we need to substitute the function g(x) into itself. This means we will replace every x in g(x) with the expression 8x−5.
Substituting g(x) into itself: Substitute g(x) into itself.g(g(x))=g(8x−5)We know that g(x)=8x−5, so we replace x with (8x−5) in the expression for g(x).g(8x−5)=8(8x−5)−5
Simplifying the expression: Simplify the expression.Now we distribute the 8 inside the parentheses:8(8x−5)−5=64x−40−5Combine like terms:64x−40−5=64x−45
Checking the answer choices: Check the answer choices.We have simplified g(g(x)) to 64x−45. Now we compare this with the given answer choices.(A) 64x−10(B) 64x−45(C) 64x2+25(D) 64x2−80x+25The correct answer is (B) 64x−45.
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