Medium Math Class 12 Level 6

In which interval is f(x) = x^2 - 14x increasing?

फलन f(x) = x^2 - 14x किस interval में increasing होगा?

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Correct Answer

D. x > 7

Explanation

Step 1: For increasing function, set f'(x) > 0. Step 2: f'(x)=2x-14; 2x-14>0 gives x>7. Step 3: To find increasing intervals, make the derivative positive.

Step 1: Increasing के लिए f'(x) > 0 रखें। Step 2: f'(x)=2x-14; 2x-14>0 से x>7 मिलता है। Step 3: Increasing interval निकालते समय derivative positive रखें।

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