Determine the common differnce and A.P sequence — task. Mathematics CBSE, Class 10.

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Answer variants:

−5

30

−6

12

21

9

3

The fourth term of an

$A.P.$ is 21. The sum of the fifth and sixth terms of the

$A.P.$ is 69. Then answer the following.

i) The common difference

$d =$

ii) The

$A.P$ is

,

,

,

..

$1$

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