Question

insert 4 A.M.betwwen 9 and 15 are:
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Answer 1

Answer:

Step-by-step explanation:

Let a1 a2 a3 a4 be AM between 9 and 15

Then

9,a1, a2, a3, a4, 15 be in ap

A=9

D= 6/5

Then

a1=9+6/5= 51/5

Like this a2=57/5

a3=63/5 and a4 69/5