\(2^{x-1}.2^{2014}=2^{2015}.\)
\(2^{x-1}=2^{2015}:2^{2014}.\)
\(2^{x-1}=2^1.\)
\(\Rightarrow x-1=1.\)
\(\Rightarrow x=1+1.\)
\(\Rightarrow x=2.\)
Vậy.....
\(2^{x-1}.2^{2014}=2^{2015}.\)
\(2^{x-1}=2^{2015}:2^{2014}.\)
\(2^{x-1}=2^1.\)
\(\Rightarrow x-1=1.\)
\(\Rightarrow x=1+1.\)
\(\Rightarrow x=2.\)
Vậy.....
rut gon
a,3x(2x-7)-3x(4x-5)
b,(-7x+8)(-2x+3)-7x(2x-4)
c,(2x-3)(3x2-2x+4)-(2x-3)(3x+4)
d,(-2+7)(3x-6)-(4x-5)(2x-6)
Tìm x:
2x + (2x+1) + (2x+2) +...+ (2x+30) = 1271
a) Tìm số tự nhiên x, y biết: (2x+1)(y-3)=12
b) Tìm số tự nhiên x biết: 2x+2x+1+2x+2+...+2x+2015=22019-8
c) So sánh: 3625 và 2536
Tìm x biết (2x+1)+(2x+2)+...+(2x+2015)
nhanh nha cần gấp
tim x
-2x(6x-2)+3x(4x-7)=8
(7x-2)(2x+3)-(3x-5)(4x+6)=2x2-5
+(-2x+3)-6x(3x-4)=-22x2+7x
c/ |2x-10| + 2x-10= 0
(x–5)3 = – (1 – 2x)(2x – 1)2
2^2x.3^2x=36^24
TÌM X
a, 3 ( x + 2) - 7 ( 2x -1 ) = x - 5 ( 1 + x)
b, ( 2x - 1 ) - 3( 1 - 2x ) x - 8
Tìm x,y biết: (2x +1)(2x +2) - 3y =89