Math, asked by gopikarohini88, 4 months ago

please help me don't post irrevalent answers

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Answered by Sirat4
1

Answer:

A is the correct answer!!

Step-by-step explanation:

f(x) = 2x

f(x1) = f(x2)

2x1 = 2x2

x1 = x2

∴ it is one - one

let y = 2x  ⇒ x = y/2

f(x) = y

Now put in f(x)

f(x) = 2(y/2) = y

∵ it is onto

It means f(x) = 2x is bijective

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