c) If n is divisible by 6, then n is divisible by 3. If n is divisible by 3, then the sum of the digits of n is divisible by 3. Thercforc, if n is divisible by 6, then the sum of the digits of n is divisible by 3. If this function is If this function is Therefore, if this function is a polynomial, then this function , then this finction is differentiable. then this function is continuous.

Q: 9 Find all the criticonl numbers of tthe function 3. メ2+メ

A:

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Q: 1. If the polynomial function

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A: