(2-1+ 5-1)-1 এর মান কত?
Solution
Correct Answer: Option B
(2-1+ 5-1)-1
={(1/2 )+ (1/5)} -1
={(5 + 2)/10} - 1
=(7/10) - 1
= 1/(7/10)
= 1 × (10/7)
= 10/7
={(1/2 )+ (1/5)} -1
={(5 + 2)/10} - 1
=(7/10) - 1
= 1/(7/10)
= 1 × (10/7)
= 10/7
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