Sequence and Series

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Question : 9 of 86

Marks: +1, -0

The sum of progression

(a+b), a,(a-b) . . . . . . . . n

term is

$\;{n}/{2}[2 a+(n-1) b]$
$\;{n}/{2}[2 a+(3-n) b]$
$\;{n}/{2}[2 a+(3-n)]$
$\;{n}/{2}[2 a+(n-1)]$

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