Question

1. The common difference of two different arithmetic progressions are equal. The first
term of the first progression is 3 more than the first term ofsecond progression. If the
7th term of first progression is 28 and 9ih term of second progression is 29, then find
the both different arithmetic progressions.​

Answer 1

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correct is

5

Given that:

Common difference is d in Both AP.

First term of first AP

A=8

A

30

=8+30d

First term of second AP

a=3

a

30

=3+30d

On subtracting equation (2) from equation (1), we get

A

30

−a

30

=8+30d−3−30d

A

30

−a

30

=5.