Question

let f be a function defined by F:X=5X²+2, xEr
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Answer 1

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Step-by-step explanation:

11th

Maths

Relations and Functions

Introduction to Functions

Let f be a function defined...

MATHS

Let f be a function defined by f(x)=5x

2

+2,x∈R. Find a such that f(a)=22

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ANSWER

f(x)=5x

2

+2

f(a)=22

⇒5a

2

+2=22

5a

2

=22−2=20

a

2

=4

a=±

4

a=±2