Question

If a=2, d=1 and n=11. Then find the sum of nth term​

Answer 1

a = 2 , d = 1 , n = 11

$</p><p></p><p> \sf \rightarrow \quad a_{n} = a + (n - 1)d \\ \\</p><p></p><p> \sf \rightarrow \quad a_{11} = 2 + (11 - 1) \cdot 1</p><p></p><p>\\ \\</p><p></p><p> \sf \rightarrow \quad a_{11} = 2 + 10</p><p></p><p>\\ \\</p><p></p><p> \sf \rightarrow \quad a_{11} = 12</p><p></p><p>$