ans- 1st term (a)= 50 common difference=3 t= a + n-1 × D t20 = 50 + 20-1 × 3 t20 = 50 + 19 ×3 t20 = 107 Reply
ans-
1st term (a)= 50
common difference=3
t= a + n-1 × D
t20 = 50 + 20-1 × 3
t20 = 50 + 19 ×3
t20 = 107