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Question Number 106432 by Dwaipayan Shikari last updated on 05/Aug/20

Commented by Dwaipayan Shikari last updated on 05/Aug/20

https://drive.google.com/file/d/12J4x021yiK1X38OHkXoomTz_VuBlcIEt/view?usp=drivesdk

Commented by Dwaipayan Shikari last updated on 05/Aug/20

Respected sirs,kindly give a try to this question :)

$$\left.{Respected}\:{sirs},{kindly}\:{give}\:{a}\:{try}\:{to}\:{this}\:{question}\::\right) \\ $$

Commented by Dwaipayan Shikari last updated on 05/Aug/20

(√(2/3))=(1/(√(3/2)))=(1/((1+(1/2))^(1/2) ))=(1+(1/2))^(−(1/2)) (1+(1/2))^(−(1/2)) =1−(1/2).(1/2)+((1.3)/(2.4)).((1/2))^2 −((1.3.5)/(2.4.6)).((1/2))^3 +((1.3.5.7)/(2.4.6.8)).((1/2))^4 −.....

$$\sqrt{\frac{\mathrm{2}}{\mathrm{3}}}=\frac{\mathrm{1}}{\sqrt{\frac{\mathrm{3}}{\mathrm{2}}}}=\frac{\mathrm{1}}{\left(\mathrm{1}+\frac{\mathrm{1}}{\mathrm{2}}\right)^{\frac{\mathrm{1}}{\mathrm{2}}} }=\left(\mathrm{1}+\frac{\mathrm{1}}{\mathrm{2}}\right)^{−\frac{\mathrm{1}}{\mathrm{2}}} \\ $$$$\left(\mathrm{1}+\frac{\mathrm{1}}{\mathrm{2}}\right)^{−\frac{\mathrm{1}}{\mathrm{2}}} =\mathrm{1}−\frac{\mathrm{1}}{\mathrm{2}}.\frac{\mathrm{1}}{\mathrm{2}}+\frac{\mathrm{1}.\mathrm{3}}{\mathrm{2}.\mathrm{4}}.\left(\frac{\mathrm{1}}{\mathrm{2}}\right)^{\mathrm{2}} −\frac{\mathrm{1}.\mathrm{3}.\mathrm{5}}{\mathrm{2}.\mathrm{4}.\mathrm{6}}.\left(\frac{\mathrm{1}}{\mathrm{2}}\right)^{\mathrm{3}} +\frac{\mathrm{1}.\mathrm{3}.\mathrm{5}.\mathrm{7}}{\mathrm{2}.\mathrm{4}.\mathrm{6}.\mathrm{8}}.\left(\frac{\mathrm{1}}{\mathrm{2}}\right)^{\mathrm{4}} −..... \\ $$

Commented by PRITHWISH SEN 2 last updated on 05/Aug/20

(1+x)^(−(1/2)) = 1−(1/2)x+((1.3)/(2.4))x^2 −((1.3.5)/(2.4.6))x^3 +.... put x=(1/2) you will get the result.

$$\left(\mathrm{1}+\mathrm{x}\right)^{−\frac{\mathrm{1}}{\mathrm{2}}} =\:\mathrm{1}−\frac{\mathrm{1}}{\mathrm{2}}\mathrm{x}+\frac{\mathrm{1}.\mathrm{3}}{\mathrm{2}.\mathrm{4}}\mathrm{x}^{\mathrm{2}} −\frac{\mathrm{1}.\mathrm{3}.\mathrm{5}}{\mathrm{2}.\mathrm{4}.\mathrm{6}}\mathrm{x}^{\mathrm{3}} +.... \\ $$$$\mathrm{put}\:\mathrm{x}=\frac{\mathrm{1}}{\mathrm{2}}\:\mathrm{you}\:\mathrm{will}\:\mathrm{get}\:\mathrm{the}\:\mathrm{result}. \\ $$

Commented by PRITHWISH SEN 2 last updated on 05/Aug/20

evaluate 1+(1/2)−((1.1)/(2.4))+((1.1.3)/(2.4.6))−((1.1.3.5)/(2.4.6.8))+...

$$\mathrm{evaluate} \\ $$$$\mathrm{1}+\frac{\mathrm{1}}{\mathrm{2}}−\frac{\mathrm{1}.\mathrm{1}}{\mathrm{2}.\mathrm{4}}+\frac{\mathrm{1}.\mathrm{1}.\mathrm{3}}{\mathrm{2}.\mathrm{4}.\mathrm{6}}−\frac{\mathrm{1}.\mathrm{1}.\mathrm{3}.\mathrm{5}}{\mathrm{2}.\mathrm{4}.\mathrm{6}.\mathrm{8}}+... \\ $$

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