Where is f(x)=x³-3(2²)x increasing?
f(x)=x³-3(2²)x कहाँ increasing है?
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Correct Answer
B. (-∞,-2) ∪ (2,∞)
ExplanationStep 1: Identify the concept: increasing function. Step 2: f'(x)=3(x²-4). It is positive when x<-2 or x>2. Step 3: Exam tip: For increasing intervals, set derivative positive.
Step 1: अवधारणा increasing function है। Step 2: f'(x)=3(x²-4) है। यह positive तब है जब x<-2 या x>2। Step 3: याद रखें: Increasing के लिए derivative positive रखें।