Question

If :R → R is defined as f(x) Solution: To find the pre-image of 17, we solve the counti 2x² 1, find the pre-images of 17,4 and -2. ​

Answer 1

Step-by-step explanation:

For pre image of 17 we have:

f(x)=x

2

+1=17

⇒x

2

+1=17

⇒x

2

=16

⇒x=

16

⇒x=±4

So, x∈{−4,4}

For pre image of −3 we have:

f(x)=x

2

+1=−3

⇒x

2

+1=−3

⇒x

2

=−4 (NOT possible)

Hennce, no possible pre image.

So, x∈ϕ

Answer 2

Answer:

hope it will help you ✌

Step-by-step explanation:

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