જો tan ^{-1}left[frac{1}{1+1 cdot 2}right]+ta | vedclass

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(D) આપણે જાણીએ છીએ કે $	an ^{-1}\left[\frac{1}{1+k(k+1)}ight] = 	an ^{-1}\left[\frac{(k+1)-k}{1+k(k+1)}ight] = 	an ^{-1}(k+1) - 	an ^{-1}(k)$.

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$\frac{n}{n+2}$

Vedclass · Answer

(D) આપણે જાણીએ છીએ કે $	an ^{-1}\left[\frac{1}{1+k(k+1)}ight] = 	an ^{-1}\left[\frac{(k+1)-k}{1+k(k+1)}ight] = 	an ^{-1}(k+1) - 	an ^{-1}(k)$.સરવાળાના દરેક પદ માટે આ સૂત્ર લાગુ પાડતા:$	an ^{-1}\left[\frac{1}{1+1 \cdot 2}ight] = 	an ^{-1}(2) - 	an ^{-1}(1)$$	an ^{-1}\left[\frac{1}{1+2 \cdot 3}ight] = 	an ^{-1}(3) - 	an ^{-1}(2)$...$	an ^{-1}\left[\frac{1}{1+n(n+1)}ight] = 	an ^{-1}(n+1) - 	an ^{-1}(n)$આ પદોનો સરવાળો કરતા,આપણને ટેલિસ્કોપિંગ શ્રેણી મળે છે:$S = (	an ^{-1}(2) - 	an ^{-1}(1)) + (	an ^{-1}(3) - 	an ^{-1}(2)) + \cdots + (	an ^{-1}(n+1) - 	an ^{-1}(n))$$S = 	an ^{-1}(n+1) - 	an ^{-1}(1)$સૂત્ર $	an ^{-1}(A) - 	an ^{-1}(B) = 	an ^{-1}\left(\frac{A-B}{1+AB}ight)$ નો ઉપયોગ કરતા:$S = 	an ^{-1}\left(\frac{(n+1)-1}{1+(n+1)(1)}ight) = 	an ^{-1}\left(\frac{n}{1+n+1}ight) = 	an ^{-1}\left(\frac{n}{n+2}ight)$આપેલ છે કે $S = 	an ^{-1}(x)$,તેથી $x = \frac{n}{n+2}$.

જો $\tan ^{-1}\left[\frac{1}{1+1 \cdot 2}\right]+\tan ^{-1}\left[\frac{1}{1+2 \cdot 3}\right]+\cdots+\tan ^{-1}\left[\frac{1}{1+n(n+1)}\right]=\tan ^{-1}[x]$ હોય,તો $x=$

Similar Questions

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

$x=\frac{1}{5}$ હોય ત્યારે $\cos \left(2 \cos ^{-1} x+\sin ^{-1} x\right)$ ની કિંમત શોધો,જ્યાં $0 \leq \cos ^{-1} x \leq \pi$ અને $-\frac{\pi}{2} \leq \sin ^{-1} x \leq \frac{\pi}{2}$ છે.

જો $\sin ^{-1}\left(\frac{x}{5}\right) + \csc ^{-1}\left(\frac{5}{4}\right) = \frac{\pi}{2}$ હોય,તો $x = $

${\sin ^{ - 1}}\left[ {x\sqrt {1 - x} - \sqrt x \sqrt {1 - {x^2}} } \right] = $

જો $3{\sin ^{ - 1}}\frac{{2x}}{{1 + {x^2}}} - 4{\cos ^{ - 1}}\frac{{1 - {x^2}}}{{1 + {x^2}}} + 2{\tan ^{ - 1}}\frac{{2x}}{{1 - {x^2}}} = \frac{\pi }{3}$ હોય,તો $x$ =

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