Toán Lớp 6: ( x + 1 ) + ( x + 3 ) + …. + ( x + 99 ) = 5100
Leave a reply
Register Now
Login
Lost Password
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Toán Lớp 6: ( x + 1 ) + ( x + 3 ) + …. + ( x + 99 ) = 5100
Comments ( 2 )
$\text{( x + 1 ) + ( x + 3 ) + ….. + ( x + 99 ) = 5100}$
$\text{( x + x + …. + x ) + ( 1 + 3 + …. + 99 ) = 5100}$
$\text{Có số các số x là: ( 99 – 1 ) : 2 + 1 = 50 ( số )}$
$\text{x × 50 + 2500 = 5100}$
$\text{x × 50 = 5100 – 2500}$
$\text{x × 50 = 2600}$
$\text{x = 2600 : 5}$
$\text{x = 52}$
(x + 1) + (x + 3) + …. + (x + 99) = 5100
=> (x + x + …. + x) + (1 + 3 + …. + 99) = 5100
=> SSH của x là: (99 – 1) : 2 + 1 = 50 (số)
=> 50x + 2500 = 5100
=> 50x = 5100 – 2500
=> 50x = 2600
=> x = 2600 : 50
=> x = 52
Vậy x = 52