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Q.

If range of the function fx=sin-1x+2tan-1x+x2+4x+1 is p,q then the value of p+q=

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answer is 4.

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Detailed Solution

fx=sin-1x+2tan-1x+x+22-3Domine of fx is -1,1also fx is incresing function in the domain   since f'x >0 for all x∈-1,1p=fminx=f-1=-π2+2-π4+1-3=-π-2and q=fmaxx=f1=π2+2π4+9-3=π+6Range of fx is -π-2,π+6 =p,qhence p+q =4
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