Math, asked by jiyachawla, 1 year ago

If 3+7+11+......+x=1275 find x

Answers

Answered by piyushaggarwal439

The value of x is 99 sorry on the page the value is mistake

Attachments:

jiyachawla: then n= x+1÷4

piyushaggarwal439: ok

jiyachawla: is it correct

Shinchan001: yea

Shinchan001: Let me solve and post it :)

jiyachawla: ya solve it

jiyachawla: after putting value I have got x^2+4x-2547=0

piyushaggarwal439: value of x is 19

jiyachawla: how?

jiyachawla: can you send its pic?

Answered by Shinchan001

Formulae used :

$\bf a_n = a + (n - 1) d \\ \\ \bf S_n = \frac{n}{2} ( a + a_n)$

If any doubt, please ask! ;)

Attachments:

Shinchan001: Thanks for Brainliest! :)

piyushaggarwal439: Well done Great!

Shinchan001: Thanka :D Ab hum itne bhi khaas nahi :p

jiyachawla: thnx.. I was making a silly mistake

Shinchan001: Haha!! Happens!

jiyachawla: hehe @shinchan

jiyachawla: also thnx @piyush for trying atleast

jiyachawla: hey @shinchan the value of X can be negative

jiyachawla: bcoz it is x not n

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