Math, asked by manish29269, 1 year ago

solve for x :1+4+7+10+...+x=287

Answers

Answered by ggaurav6676

2

sn is sum of n numbers , n is nth term to ding , a is frist term d is common diffrence use formula sn=n/2(a+(n-1)d)

Answered by msbhanusepb1bl6

1

use sum of no. formula of A.P

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