Toán Lớp 7: x.2 ²⁰¹⁸ – 2 ²⁰¹⁷=8⁶⁷³
Giúp mình với
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: x.2 ²⁰¹⁸ – 2 ²⁰¹⁷=8⁶⁷³
Giúp mình với
Comments ( 2 )
<=>2^2017(x.2-1)=(2^3)^673
<=>2^2017(2x-1)=2^2019
<=>2x-1=2^2
<=>2x-1=4
<=>2x=5
<=>x=5/2
Vậy x=5/2
=>x*2^2018 -2^2017 = 2^{673*3}
=>x*2^2018=2^2019
=>2^2017(x*2-1)=2^2019
=>2^2017(2x-1) :2^2017=2^2019 : 2^2017
=>1*(2x-1)=2^{2019-2017}
=>2x-1=2^2
=>2x-1=4
=>2x=5
=>x=5/2
Vậy x=5/2