For real numbers α, β, γ and δ , if ∫x2−1+tan−1x2+1xx4+3x2+1tan−1x2+1x dx=αlogetan−1x2+1x+βtan−1γx2−1x+δtan−1x2+1x+C
where C is an arbitrary constant, then the value of 10α+βγ+δ is equal to _____
G.E.=I=∫x2-1dxx4+3x2+1tan-1x2+1x+∫dxx4+3x2+1I=∫x21-1x2dxx2x2+3+1x2tan-1x2+1x+∫dxx2x2+3+1x2,Now, I1=∫1-1x2dxx+1x2+1tan-1x+1x, Take tan-1x+1x=θ, x+1x=tanθ, 1-1x2 dx=sec2θdθ
=∫sec2θdθ1+tan2θθ=logθ=logtan-1x+1x and I2=12∫1+1x2-1-1x2x2+3+1x2dx =12∫1+1x2dxx-1x2+5-12∫1-1x2dxx+1x2+1 =1215tan-1x-1x5-12tan-1x+1x1
∴I=logtan-1x+1x+1215tan-1x-1x5-12tan-1x+1x1 =logtan-1x+1x+1215tan-115x2-1x-12tan-1x2+1xComparing, we get α=1,β=125,γ=15,δ=-12 ∴10(α+βγ+δ)=101+110-12=10+1-5=6