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Question Number 175814 by Mortalis last updated on 07/Sep/22

Commented by Mortalis last updated on 07/Sep/22

$C a n a n y o n e h e l p m e s o l v e t h i s q u e s t i o n ?$
	Answered by Rasheed.Sindhi last updated on 07/Sep/22

	$S_{n} = \frac{n}{2} (a + l); a : f i r s t t e r m, l = l a s t t e r m$ $S_{p} = \frac{p}{2} (a + l) . . . . . . . . . . . . . . (i)$ $S_{p} = \frac{q - 3}{2} (a + l); l = 13 . . . . . (i i)$ $C o m p a r i n g (i) & (i i) :$ $p = q - 3 \Rightarrow q = p + 3$
	Answered by Cesar1994 last updated on 07/Sep/22

	$a)$ $S_{p} = \frac{p}{2} (a + 13)$ $\frac{q - 3}{2} (a + 13) = \frac{p}{2} (a + 13)$ $\Rightarrow q - 3 = p$ $\Rightarrow q = p + 3$
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