12. ljy dhft, % (0.11-910-15 (0) 2 ...
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12. ljy dhft, % (0.11-910-15 (0) 2 ( ਰੇਡ 7696 06 ) (3) (4) 109

11th - 12th Class
Maths
Solution
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12. (2) ( left(frac{1}{9}right)^{2}left{1-9left(frac{16-1}{90}right)^{2}right} ) ( =frac{1}{81}left{1-9left(frac{1}{6} times frac{1}{6}right)right} ) ( =frac{1}{81}left(1-frac{9}{6 times 6}right)=frac{1}{81} times frac{3}{4} ) ( =frac{1}{108} )
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