Question

Which term of an A.P is 93, if a = 150 and d = -3?​

Answer 1

a = 150

d = -3

an = 93

n = ?

an = a + (n-1)d

93 = 150 + (n-1) (-3)

93 = 150 -3n +3

93 = 153 - 3n

3n = 153 - 93

3n = 60

n = 20

Hence, 20th term is 93 of the A.P where a = 150 and d = -3