\(\left(x+1\right)+\left(x+2\right)+...+\left(x+211\right)=23632\\ \left(x\times211\right)+\left(1+2+...+211\right)=236032\\ \left(x\times211\right)+22366=236032\\ x\times211=236032-22366\\ x\times211=1266\\ x=1266:211\\ x=6\)
(x+1)(x+2)(x+3)(x+4)+.....+(x+211)=23632
=> (x + x + x + .... + x) x ( 1 + 2 + 3 + 4+....+ 211) = 23632
Có tất cả số hạng là:
\(\left(211-1\right):1+1=211\left(số\right)\)
=> \(x\times211=\text{ 23632}\)
\(x=\text{ 23632:211}\)
\(x=112\)
` = x + ( 1 + 2 +3 + 4 + .... + 210 + 211 ) = 23632`
` =x + ( 1 + 211 ) + ( 2 + 210 ) + .... =23632`
` x + 212 xx 105 =23632`
` x + 22260 = 23632`
` x = 23632 - 22260`
` x = 1372`
