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Question

If edy/dx=x+1 given that when x=0,y=3 then minimum (local) value of y=f(x) is

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Solution

edy/dx = x+1

Taking natural log of both sides,

dydx = ln(x+1) = 0 (for local minima)

x+1=1
x=0

It is already given that at x = 0 , y = 3 . Thus, at local minima x=0 , y=f(x)=3



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