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If y = 1/4 u^4, u = (2/3)x^3 + 5, then dy/dx is … (a) (1/27) x^2(2x^3 + 15)^3 (b) (2/27) x(2x^3 + 5)^3 (c) (2/27) x^2(2x^3 + 15)^3

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If y = 1/4 u4, u = (2/3)x3 + 5, then dy/dx is …

(a) (1/27) x2(2x3 + 15)3

(b) (2/27) x(2x3 + 5)3

(c) (2/27) x2(2x3 + 15)3 

(d) -(2/27) x(2x3 + 5)3

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(c) (2/27) x2(2x3 + 15)3 

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