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যদি

f (x) = \sqrt{x - 2}

g (x)^{2} = x^{2} + 1

হয়, তাহলে fog এর ডোমেন হবে -

(- \propto, - 1) \cup (1, - \propto)

[- 1, 1]

(- \propto, \propto)

(- \propto, - 1) \cup (1, \propto)

ANS : 4

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