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[" enter the correct numerical value (in...

[" enter the correct numerical value (in decimal notation,truncated/rounded-off to the second decimal pla "],[" e.g."6.25,7.00,-0.33,-30,30.27,-127.30" )."],[" Marking scheme : "+4" for correct answer,"0" in all other cases."],[" 21.The number of real solutions of "tan^(-1)sqrt(x(x+1))+sin^(-1)sqrt((x^(2)+x+1))=(pi)/(2)" is "]

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