Question:`a/b = c/d` হলে-- i. 1 - a/b = 1 - c/d` ii. `(a - 1)/b = (c - 1)/d` iii. a + b : c + d = b : d নিচের কোনটি সঠিক?
A i ও ii B i ও iii C ii ও iii D i, ii ও iii
+ AnswerB
+ Explanation`(a + b)/b = (c + d)/d` বা, `(a + b)/(c + d) = b/d` :. a + b : c + d = b : d
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