જો $\tan ^{-1}(x+1)+\tan ^{-1} x+\tan ^{-1}(x-1)=\tan ^{-1} 3$ હોય,તો $x < 0$ માટે $500 x^4+270 x^2+997$ ની કિંમત શોધો.

  • A
    $6716$
  • B
    $1767$
  • C
    $1768$
  • D
    $6717$

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$50 \tan \left(3 \tan ^{-1}\left(\frac{1}{2}\right)+2 \cos ^{-1}\left(\frac{1}{\sqrt{5}}\right)\right)+4 \sqrt{2} \tan \left(\frac{1}{2} \tan ^{-1}(2 \sqrt{2})\right)$ ની કિંમત શોધો.

સરવાળો $\sum\limits_{n = 1}^\infty {{\cot }^{ - 1}} \left( {\frac{{2\left( {\sum\limits_{k = 1}^n k } \right) - 1}}{3}} \right)$ ની કિંમત શોધો.

જો $a_1, a_2, a_3, \dots, a_n$ એ $d$ સામાન્ય તફાવત ધરાવતી $A.P.$ હોય,તો $\tan \left[ \tan^{-1} \left( \frac{d}{1 + a_1 a_2} \right) + \tan^{-1} \left( \frac{d}{1 + a_2 a_3} \right) + \dots + \tan^{-1} \left( \frac{d}{1 + a_{n-1} a_n} \right) \right] = $

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જો $\alpha$ અને $\beta$ (જ્યાં $\alpha > \beta$) એ સમીકરણ $3\cos^{-1}\left(x^2 - 5x - \frac{11}{2}\right) = \pi$ ના બે શૂન્યો હોય,તો $(\alpha^2 + \beta^3)$ ની કિંમત શોધો.

જો $f(x) = \sin^{-1}\left(\frac{2x}{1+x^2}\right) + \cos^{-1}\left(\frac{1-x^2}{1+x^2}\right)$,જ્યાં $x \in (1, \infty)$,તો $f'(x)$ ની કિંમત શોધો.

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