Which interval is f decreasing when f' (x) = x - x? (a). (-00,-1) (b). (-0o, 0) (c). (-1,1) (d). (0, co)

Q: Find the derivative

A: find the derivative of the given

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Q: # 41) Use the definition of derivative to find f(r) and "(r) for (r)= 1+ 4r- r

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A: According to question that :y'=-x2+1x2-42

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A: If f'(x) >0 then f is increasing.

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A: As we know that; The Quotient rule: fg'=f'·g-g'·fg2 The Product rule: f·g'=f'·g+f·g' The…

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Q: a) A function is given below with unknown coefficients B and C: f(x) = x³ - 6x² + Bx + C i) Find the…

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Q: O 16xsec²(4x²)tan(4x²)

A: Given that the function