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Question

If x=at2,y=2at at then dydx=?

A
1/t
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B
t
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C
t2
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D
1
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Solution

The correct option is A 1/t
According to question,

x=at2 , y=2at

So, dxdt=2at ………(1)

And, dydt=2a …………(2)

On dividing (2) by (1), we get

dydx=2a2at

dydx=1t



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