Question

Find the 19th term of the following a.p :7,13,19,25,......

Answer 1

Step-by-step explanation:

we know that an = a + ( n-1 ) d

so, a19 = 7+ (19-1 ) d

here d= 13-7 =6

thus a19 = 7 + 18* 6

a19 = 7 + 108

a19= 115

so 19th term of this ap is 115