Differentiate y = 3x² + 5x:
A6x + 5CORRECT
B3x + 5
C6x² + 5x
D3x² + 5
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Why the answer is A, and why the others tempt you.
dy/dx: derivative of 3x² = 6x; derivative of 5x = 5. Total: 6x + 5.
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