2 years ago

Given that f(x) = x²-1, a) Find f(5) b) Find f-'(x) c) Find f-'(8)

Mathematics

1 answer:

Zigmanuir [339]2 years ago

7 0

Answer:

step by step as shown

Step-by-step explanation:

f(x) = x²-1

f(5) = 5² - 1 = 24

f⁻¹(x)

y = x²-1

x = y² - 1 swap x and y

y² = x+1 ... x+1 ≥ 0 x≥-1

y = √x+1

f⁻¹(x) = √x+1

f⁻¹(8) =√8+1 = √9 = 3

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