anonymous
  • anonymous
Given the function f(x) = log4(x + 8), find the value of f−1(2). a. f−1(2) = 4 b. f−1(2) = 8 c. f−1(2) = 10 d. f−1(2) = 17
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
hi are you still on? i can help
anonymous
  • anonymous
we need to find the inverse. do you know how to do that?
anonymous
  • anonymous
don't i replace x with y and y with x?

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anonymous
  • anonymous
f(x) = log4(x + 8) y = log4(x + 8) x = log4(y + 8) Now solve for y from there. x = log4(y + 8) \[f-1(x) = -8 + 4^x\]
anonymous
  • anonymous
now just plug in 2, what do you get?
anonymous
  • anonymous
-8 + 4^2 4^2 = 16 -8+16 = 8 your answer will be B.
anonymous
  • anonymous
do you need anymore help?
anonymous
  • anonymous
if so close this question and post another one and invite me. please medal me though
anonymous
  • anonymous
oh okay, thank you so so much! and yes, i do. is it okay if i post it separately? so incase any one else needs help, they can find it easier.
anonymous
  • anonymous
yes awesome

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