Find dy/dt. 7) y= (ecos(u7)4 A) - esin(u7)3 B) co4 cos(/7) COS e3 cos(t/7) D) - sin e4 cos(t/7) Find y". 8) y = (/x - 7)-3 В) - 2x 3 C)- (Wx-7)-4 D) 6(/x - 7)-5

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A: Given.

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A: I have used the rule for composition of function and multiplication of functions

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A: In this question, we will find the solution to the given problem.

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A: Note:-Since you asked multiple questions, according to our policy we can answer only first question…

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A: We are authorized to solve only 1 question, please repost remaining questions Differential equation

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A: Recall: Chain Rule of differentiation :    If F(x)=f(g(x)) then ,   F'(x) = df(g(x))dx =…

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