Question:৫সরল কর `(2^-1 + 5^-1)^-1`
Answer সমাধান `(2^-1 + 5^-1)^-1` `= (1/2 + 1/5)^-1` `= ((5 + 2)/10)^-1` `= (7/10)^-1` `= 1/7` `= 1 xx 10/7` `= 10/7` Ans.
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৫shorol kar `(2^-1 + 5^-1)^-1`