No products in the cart.

let f:r-r be a function given …

CBSE, JEE, NEET, CUET

Question Bank, Mock Tests, Exam Papers

NCERT Solutions, Sample Papers, Notes, Videos

let f:r-r be a function given by f(x)=x²+2.find f^-1(27).

Posted by Tushar Choudhary 7 years, 1 month ago

Neeraj Sharma 7 years, 1 month ago

{tex}let\,{f^{ - 1}}\left( {27} \right) = x{/tex}

{tex} \Rightarrow f\left( x \right) = 27{/tex}

{tex} \Rightarrow {x^2} + 2 = 27{/tex}

{tex} \Rightarrow {x^2} = 25{/tex}

{tex} \Rightarrow x = \pm 5{/tex}

{tex}Hence{/tex}

{tex}{f^{ - 1}}\left( {27} \right) = \left\{ { - 5,5} \right\}{/tex}

ANSWER

Related Questions

Prove by mathematical induction that n(n+1) is even

Posted by Aditya Vinayak 1 month, 2 weeks ago

CBSE > Class 11 > Mathematics

What is sin60

Posted by Ullas Cs 1 month, 2 weeks ago

CBSE > Class 11 > Mathematics

Solve cos2x -5sinx -3=0

Posted by Prince Kumar 1 month ago

CBSE > Class 11 > Mathematics

Find the centre and radius of the circle x2+y2-x+2y-3=0

Posted by Siddhi Jadhav 3 days, 7 hours ago

CBSE > Class 11 > Mathematics

Option of photo

Posted by Rishi Raj Singh 2 days, 7 hours ago

CBSE > Class 11 > Mathematics

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Posted by Not Fine Bro 🎭 1 month, 1 week ago

CBSE > Class 11 > Mathematics