Question

the ratio of 7th and 3rd term of an AP is 12:5. find the first three terms.
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Answer 1

Step-by-step explanation:

ANSWER

7

3

7

7

=

a+2d

a+6d

=

5

12

⇒5a+30d=12a+24d

⇒6d=7a

⇒d=

6

7a

⇒

7

4

7

13

=

a+3d

a+12d

=

a+3

6

7a

a+12

6

7a

7

4

7

13

=

6a+21a

6a+84a

=

27d

90d

=

3

10

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