Math, asked by seju2661, 1 year ago

$if \: 1 + 4 + 7 + 10 + ..... + x = 287 \: find \: the \: value \: of \: x$
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Answers

Answered by sonalmishra

0

sx = n/2(a+ax)
287 =x/2 (x+1)

seju2661: Sorry but i did not understand

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