a - [a - {a - (a - 1)}] = ?
সমাধান
সঠিক উত্তর: Option A
a - [a - {a - (a - 1)}]
= a - [a - {a - a + 1}]
= a - [a - {1}]
= a - [a - 1]
= a - a + 1
= 1
= a - [a - {a - a + 1}]
= a - [a - {1}]
= a - [a - 1]
= a - a + 1
= 1