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If ysqrt(x^2+1)=log(sqrt(x^2+1)-x),then(...

If `ysqrt(x^2+1)=log(sqrt(x^2+1)-x),`then`(x^2+1)dy/dx+xy+1=`

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B

1

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2

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none of these

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AAKASH SERIES-DIFFRENTATION-ADDITIONAL PRACTICE EXERCISE (LEVEL - I (MAIN))(Straight Objective Typee Questions)
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