Question

If the common difference of an AP is 5, then what is
018 - 413?
(a) 5
(b) 20
(c) 25
(d) 30​

Answer 1

Answer:

a_{18}-a_{13} =25

Step-by-step explanation:

Common difference of AP = d = 5

Formula of nth term in AP = a_n=a+(n-1)d

Substitute n = 18

a_{18}=a+(18-1)5

a_{18}=a+85

Substitute n = 13

a_{13}=a+(13-1)5

a_{13}=a+60

Now we are given that a_{18}-a_{13}

a_{18}-a_{13}

a+85-(a+60)

a+85-a-60

85-60

25

Hence a_{18}-a_{13} =25

Answer 2

please make sure that your options are right