Toán Tìm x : ( x + 1 ) + ( x + 2 ) + … + ( x + 100 ) = 7450 01/07/2021 By Mackenzie Tìm x : ( x + 1 ) + ( x + 2 ) + … + ( x + 100 ) = 7450
`(x + 1) + (x + 2) + … + (x + 100) = 7450` `=> 100x + (1 + 2 + .. + 100) = 7450` `=> 100x + 5050 = 7450` `=> 100x = 7450 – 5050` `=> 100x = 2400` `=> x = 2400 : 100 = 24.` Trả lời
$\text{( x + 1 ) + ( x + 2 ) + … + ( x + 100 ) = 7450}$ ( x + x + … + x) + (1+2+3+…+100)= 7450 $\text{100 số hạng}$ $\text{100x + (1 + 100) . 100 : 2 = 7450}$ $\text{100x + 101 . 100 : 2 = 7450}$ $\text{100x + 10100 : 2 = 7450}$ $\text{100x + 5050 = 7450}$ $\text{100x = 7450 – 5050}$ $\text{100x = 2400}$ $\text{x = 2400 : 100 $\text{x = 24}$ CHÚC BẠN HỌC TỐT! BY@CUGIAI2K9 NOCOPY# Trả lời
`(x + 1) + (x + 2) + … + (x + 100) = 7450`
`=> 100x + (1 + 2 + .. + 100) = 7450`
`=> 100x + 5050 = 7450`
`=> 100x = 7450 – 5050`
`=> 100x = 2400`
`=> x = 2400 : 100 = 24.`
$\text{( x + 1 ) + ( x + 2 ) + … + ( x + 100 ) = 7450}$
( x + x + … + x) + (1+2+3+…+100)= 7450
$\text{100 số hạng}$
$\text{100x + (1 + 100) . 100 : 2 = 7450}$
$\text{100x + 101 . 100 : 2 = 7450}$
$\text{100x + 10100 : 2 = 7450}$
$\text{100x + 5050 = 7450}$
$\text{100x = 7450 – 5050}$
$\text{100x = 2400}$
$\text{x = 2400 : 100
$\text{x = 24}$
CHÚC BẠN HỌC TỐT!
BY@CUGIAI2K9
NOCOPY#