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Let f :R to R is defined by f(x)={{:((x...

Let `f :R to R ` is defined by `f(x)={{:((x+1)^(3),,x le1),(ln x+(b^(2)-3b+10),, x gt1):}` If f (x) is invertible, then the set of all values of 'b' is :

A

`{1,2}`

B

`phi`

C

`{2,5}`

D

None of these

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The correct Answer is:
A
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