Question

f:R-{0} = R ,f(x) =x²+4√x+3 then find f(4),f(16)​

Answer 1

Step-by-step explanation:

f:R1→(4,∞)

f(x)=x2+4

f(x1)=f(x2)

 x12+4=x22+4

x1=x2  f(x) is on-one.

f(x)=x2+4

y=x2+4

x2=y−4

x=y−4

 f(x)=x2+4

f(x)=(y−4)2+4

f(x)=y−4+4

f(x)=y

f(x) is onto function.

So,f(x) is bijective, Hence it is invertible

f(x)=x2+4

y=x2+4

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Answer 2

Answer:

√X-4 is the answer.

Formula us written in the photo.

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