Question

A=? D=_3 n=18 an=-5 isme a ka maan gyat krna h

Answer 1

Answer:

$an = a + (n - 1)d \\ - 5 = a + (18 - 1)3 \\ - 5 - a + 17 \times 3 \\ 5a = 51 \\ a =51 - 5 \\ a = 46$