Two a. ps have the same common difference. if the first terms of each a. ps are-1 and -8 then find the difference between the fourth terms

The difference between the fourth terms is 7

Step-by-step explanation:

Solution:

For 1st A.P

Given

First term a = -1

common difference = d

n = number of term

Now by formula of A.P we get

For n =4

For 2nd  A.P

First term a = -8

common difference = d

n = number of term

Now by formula of A.P we get

For n =4

Difference Between the Fourth terms=

i think it is 18

step-by-step explanation: