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f-x-1-x-3-4-1-7-find-f-1-x-




Question Number 12855 by kunalshukla95040 last updated on 04/May/17
f(x)=[1−(x−3)^4 ]^(1/7)   find f^(−1) (x).
f(x)=[1(x3)4]1/7findf1(x).
Answered by linkelly0615 last updated on 04/May/17
f(x)=[1−(x−3)^4 ]^(1/7)   ⇒(f(x))^7 =1−(x−3)^4   ⇒1−(f(x))^7 =(x−3)^4   ⇒[1−(f(x))^7 ]^(1/4) =x−3  ⇒[1−(f(x))^7 ]^(1/4) +3=x  ∵f^(−1) (f(x))=x  ∴f^(−1) (x)=[1−x^7 ]^(1/4) +3
f(x)=[1(x3)4]1/7(f(x))7=1(x3)41(f(x))7=(x3)4[1(f(x))7]1/4=x3[1(f(x))7]1/4+3=xf1(f(x))=xf1(x)=[1x7]1/4+3

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