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Q.

If x=t+1t,and,y=t1t,thendydx,is equal to 

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a

t2+1t21

b

1+t21t2

c

1t21+t2

d

t21t2+1

answer is A.

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Detailed Solution

detailed_solution_thumbnail

Given that'

x=t+1t and y=t1t

we have,

t+1t2t1t2=4

  x2y2=4

 Now, differentiating  w.r.t.x, we get

2x2ydydx=0dydx=xy=t2+1t21

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