For y=x^7, what is d²y/dx² at x=5?
y=x^7 के लिए d²y/dx² at x=5 क्या है?
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Correct Answer
B. 131250
ExplanationStep 1: Identify the concept: second derivative. Step 2: The second derivative is n(n-1)x^(n-2). Substituting x=5 gives 131250. Step 3: Exam tip: Apply the power rule twice for a second derivative.
Step 1: अवधारणा second derivative है। Step 2: Second derivative n(n-1)x^(n-2) है। x=5 रखने पर 131250। Step 3: याद रखें: Second derivative के लिए power rule दो बार लगाएं।