Question

If 4/5 ,a,12/5 are three consecutive terms of an ap ,find a

Answer 1

4/5 a,12/5,.......

a=4/5

d=a2-a1

=5a-4/5

Answer 2

Answer:

a=4/5

a2=a

a3=12/5

d=a2-a

=a3-a

a2-a=a3-a2

a-4/5=12/5-a

5a/5-4/5=12/5-5a/5 (Taking LCM)

5a-4=12-5a (Dividing throughout by 5)

5a+5a=12+4

10a=16

a=16/10

a=8/5

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