Question

2.If the common difference of an AP is 5, then what is
a18-a13​

Answer 1

Answer:

25

Step-by-step explanation:

use the formula of An of AP for both n=18 and n=13 and subtract them.

Answer 2

a18 =a+17d

a18 =a+ 85----------1 eq.

a13= a+ 12d

a13= a+ 60----------2 eq.

now we have to find a18-a13

from eq 1 and 2 put the value of a18 and a13

a18-a13 = a+85-(a+60)

a18-a13= a+85-a-60

a18-a13= 25

therefore; your answer is 25