Toán Lớp 7: Tìm xthuộcZ biết:
a) 2x-1 = 16 b) (x -1)2 = 25 ∈ ∈
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 7: Tìm xthuộcZ biết:
a) 2x-1 = 16 b) (x -1)2 = 25 ∈ ∈
Comments ( 2 )
A) 2x – 1 =16
2x = 16+1
2x=17
X=17:2
X=8,5
Vậy x=8,5
B)(x-1).2=25
X-1=25:2
X-1=12,5
X=12,5+1
X=13,5
Vậy x = 13,5