1.Relation and Function
normal

વક્ર $y = f(x)$ નો ગ્રાફ આપેલ છે તો સમીકરણ $f(f(x)) =2$ ના ઉકેલોની સંખ્યાઓ ......... થાય.

A

$1$

B

$4$

C

$3$

D

એક પણ નહી

Solution

$f(x)=2$ has $3$ solutions $x=-3,1 / 2, \alpha$

where $(2<\alpha<3).$

Now $f(x)=-3$ has no solution

$f(x)=1 / 2$ has $2$ solutions

$f(x)=\alpha$ has $2$ solutions

So, $f(f(x))=2$ has $4$ solutions

Standard 12
Mathematics

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