Question

find the number of terms in each of the following APs: 7,13,19,​

Answer 1

Answer:

In an AP we use symbol A to define first term...

D = difference

N = no of terms

the formula that we used

to find an AP = a + ( n -1 )d

Step-by-step explanation:

Now your solution

a = 7 , d = 13- 7 = 6

first term a =7

a2 = 13

a3 = 19

a4 = a +( n - 1)d = 7 + ( 4 - 1)6 = 7+ 18 = 25

a5 = a + ( n -1)d = 7+ (5 - 1) 6 = 7+ 24 = 31

by using this formula a + ( n-1)d you can find all the terms of an AP