Question

if the comman difference of AP is 5 what isa18-a13

Answer 1

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Answer 2

$hey \: mate \: here \: is \: your \: answer...$


$common \: difference = 5$


$a18 - a13 = a + 17d - (a + 12d)$
$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = a + 17d -a - 12$
$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 17d - 12d$
$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 5d$
$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 5(5)$
$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 25$


$hence \: a18 - a13 = 25$






$hope \: it \: helps.....$