Where is f(x)=x³-3(1²)x increasing?
f(x)=x³-3(1²)x कहाँ increasing है?
Show answer and explanation
Correct Answer
D. (-∞,-1) ∪ (1,∞)
ExplanationStep 1: Identify the concept: increasing function. Step 2: f'(x)=3(x²-1). It is positive when x<-1 or x>1. Step 3: Exam tip: For increasing intervals, set derivative positive.
Step 1: अवधारणा increasing function है। Step 2: f'(x)=3(x²-1) है। यह positive तब है जब x<-1 या x>1। Step 3: याद रखें: Increasing के लिए derivative positive रखें।