What is the difference between increasing function and decreasing function?
A function is increasing where f'(x) > 0 (rising) and decreasing where f'(x) < 0 (falling); f'(x) = 0 marks turning points.
A function is increasing where f'(x) > 0 (rising) and decreasing where f'(x) < 0 (falling); f'(x) = 0 marks turning points. A reliable way to keep them apart is to focus on what each one is defined by, not just the similar-sounding words.
Key point
increasing function vs decreasing function
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