Question

A28-a23 =15 then the common difference of the ap

Answer 1

Answer:

3

Step-by-step explanation:

just use the general formula of An = a + (n-1) × d

for both n=28 and n= 23 and solve as shown.

Answer 2

Answer:

d= 3

Step-by-step explanation:

a28 -a23 = 15

here

a28 = a+27d....…......1 eq.

a23= a+22d..............2eq.

from eq 1 and 2 put the value of a28 and a23

a28-a23=15

a+27d-(a+22d) = 15

a+27d-a-22d = 15

=>

27d - 22d = 15

5d= 15

d= 15/5

d= 3

therefore; your answer is 3