Question

determine the ap whose 4th term is 15 and 7th term is 27

Answer 1

Answer:

4th term = a+ (n-1) d

15= a + (4-1)d

15=a+3d - - - - - - > 1

7th term = a + (7-1)d

27=a+6d------------>2

2-1

27-15=a+6d-a-3d

12=3d

d =4

a=3

So, ap is 3,7,11,15,19etc.....

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