C. 21 / 21
ExplanationStep 1: f∘g means f(g(x)). Step 2: g(5)=7 and f(7)=21. Step 3: In composition solve the inside function first.
Step 1: f∘g का अर्थ f(g(x)) होता है। Step 2: g(5)=7 और f(7)=21 है। Step 3: Composition में अंदर वाला function पहले solve करें।
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