Math, asked by MDwahidsidd3772, 3 months ago

Sum of the First 4 terms arithmetic sequence is 72

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Answered by hardikrawat7753

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Step-by-step explanation:

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Answered by srijansarvshresth135

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Step-by-step explanation:

$a - 3d + a - d + a + d + a + 3d = 72 \\ \\ 4a = 72 \\ a = 18$

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