1.

If y=(sqrt(a+x)-sqrt(a-x))/(sqrt(a+x)+sqrt(a-x)), then dy/dx is equal to

Answer»

`(AY)/(xsqrt(a^2-x^2))`
`(ay)/SQRT(a^2-x^2)`
`(ay)/(xsqrt(x^2-a^2))`
`(ay)/(xsqrt(x^2+a^2))`

ANSWER :A


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