IF ` y= ( tan ^(-1) x)^(2) " then " (x^(2) +1)^(2) (d^(2)y)/(dx^(2))+2x(x^(2)+1)(dy)/(dx)=`A. 4B. 2C. 1D. 0

IF ` y= ( tan ^(-1) x)^(2) " then " (x^(2) +1)^(2) (d^(2)y)/(dx^(2))+2

1.	IF ` y= ( tan ^(-1) x)^(2) " then " (x^(2) +1)^(2) (d^(2)y)/(dx^(2))+2x(x^(2)+1)(dy)/(dx)=`A. 4B. 2C. 1D. 0
Answer» Correct Answer - B

The statement pattern `p^^(~p^^q)`isA. a tautolog yB. a contradictionC. equivalent to `p ^^ q`D. equivalent to `p vv q`
The sum of the first 10 terms of the series `9+99+999 +….., ` isA. `(9)/(8)(9^(10)-1)`B. `(100)/(9)(10^(9)-1)`C. `10^(9)-1`D. `(100)/(9)(10^(10)-1)`
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If `2sin(theta+(pi)/(3))=cos(theta-(pi)/(6))` then `tan theta`=A. `sqrt(3)`B. `(-1)/(sqrt(3))`C. `(1)/(sqrt(3))`D. `-sqrt(3)`
IF ` tan ^(-1) 2x + tan ^(-1) 3x =(pi)/(4) , ` then x=A. `-1`B. `(1)/(3)`C. `(1)/(6)`D. `(1)/(2)`