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Find the value of  ((√3−1)(√3+1)+(√3+1)(√3−1)+(2−√3)(2+√3)+(2+√3)(2−√3)).(\frac{(√3-1)}{(√3+1)}+\frac{(√3+1)}{(√3-1)}+\frac{(2-√3)}{(2+√3)}+
Question

Find the value of  ((31)(3+1)+(3+1)(31)+(23)(2+3)+(2+3)(23)).(\frac{(√3-1)}{(√3+1)}+\frac{(√3+1)}{(√3-1)}+\frac{(2-√3)}{(2+√3)}+\frac{(2+√3)}{(2-√3)}).​​

A.

18

B.

14

C.

20

D.

16

Correct option is A

Given:    

((31)(3+1)+(3+1)(31)+(23)(2+3)+(2+3)(23)).(\frac{(√3-1)}{(√3+1)}+\frac{(√3+1)}{(√3-1)}+\frac{(2-√3)}{(2+√3)}+\frac{(2+√3)}{(2-√3)}).  

Solution: 

((31)(3+1)+(3+1)(31)+(23)(2+3)+(2+3)(23)).(\frac{(√3-1)}{(√3+1)}+\frac{(√3+1)}{(√3-1)}+\frac{(2-√3)}{(2+√3)}+\frac{(2+√3)}{(2-√3)}).  

((31)2+(3+1)2(3)21+(23)2+(2+3)2(2232)(\frac{(√3-1)^2+(√3+1)^2}{(\sqrt3)^2 - 1}+\frac{(2-√3)^2 + (2+√3)^2}{(2^2-√3^2)}  

(3+123+3+1+23)31+(4+323+4+3+23)43\frac{ ( 3 + 1 - 2\sqrt3 + 3 + 1 + 2\sqrt3)}{ 3 -1} + \frac{(4 + 3 - 2\sqrt3 + 4 + 3 +2 \sqrt3 )}{4 - 3 }  

4+144 + 14 

= 18


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