1.Relation and Function
normal

જો $\,\,f(x) = \left\{ {\begin{array}{*{20}{c}}
  {3 + x;\,\,\,\,\,x \geqslant 0} \\ 
  {2 - 3x;\,\,\,\,\,x < 0} 
\end{array}} \right.$ હોય તો  $\mathop {\lim }\limits_{x \to 0} f(f(x))$ ની કિમત મેળવો.

A

$9$

B

$6$

C

$-4$

D

અસ્તિતવ નથી

Solution

$(2^x-1)\,(2^x-7)=7 \Rightarrow x = 3$ only

Standard 12
Mathematics

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