For a decreasing function how is the derivative generally?

B. negative या zero / Negative or zero

Step 1: Identify the concept: this is monotonicity using derivatives. Step 2: In a decreasing function the slope goes downward so derivative is generally negative or zero. Step 3: Remember decreasing means non positive derivative.

Step 1: concept पहचानें: यह derivatives से monotonicity है। Step 2: Decreasing function में slope नीचे की ओर होती है इसलिए derivative generally negative या zero होता है। Step 3: Decreasing means non positive derivative याद रखें।