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Question Number 39457 by Raj Singh last updated on 06/Jul/18

Answered by MrW3 last updated on 06/Jul/18

$$y=f\left(x\right)=b{e}^{-\frac{x}{a}}$$$$f\left(0\right)=b$$$$y^{\prime }=f^{\prime }\left(x\right)=-\frac{b}{a}{e}^{-\frac{x}{a}}$$$$f^{\prime }\left(0\right)=-\frac{b}{a}$$$$eqn.oflinethrough(0,b)andwith$$$$slopem=-\frac{b}{a}is$$$$y-b=-\frac{b}{a}(x-0)$$$$\Rightarrow ay+bx=ab$$

Commented by Raj Singh last updated on 06/Jul/18

$$thankssir$$

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