Exampler exercise problem XXIV — task. Mathematics CBSE, Class 10.

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1. Find

$a, b$ and

$c$ such that the following numbers are in AP:

$a, 7, b, 23, c$ .

The value of

$a$ is .

The value of

$b$ is .

The value of

$c$ is .

2. Determine the AP whose fifth term is

$19$ and the difference of the eighth term from the thirteenth term is

$20$ .

The required sequence is , , ,...

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