Question

Find the 19th yerm of the A.P. 7,13,19,25,........,​

Answer 1

T19 = 7 + 18d = 7 + 18× 6 = 7 + 108 = 115

Answer 2

Given,

AP : 7,13,19,25

Before finding the 19th term of AP. First we should find Difference (d)

d = a2 - a1

d = 13 - 7

d = 6

Then,

19th term = a + 18d

= (7) + 18(6)

= 7 + 108

= 115

Therefore, 115 is the 19th term of AP.