C. 23 / 23
ExplanationStep 1: Derivative of a linear expression equals coefficient of x. Step 2: Derivative of 23x is 23 and derivative of -9 is 0. Step 3: Derivative of a constant is zero.
Step 1: Linear expression का derivative x के coefficient के बराबर होता है। Step 2: 23x का derivative 23 और -9 का derivative 0 है। Step 3: Constant का derivative zero होता है।
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