\(\Leftrightarrow5^x\left(5^{-2}.5^2\right)=5^4.5^5\)
\(\Leftrightarrow5^x.1=5^9\Rightarrow5^x=5^9=1953125\)
\(\Leftrightarrow5^x\left(5^{-2}.5^2\right)=5^4.5^5\)
\(\Leftrightarrow5^x.1=5^9\Rightarrow5^x=5^9=1953125\)
\(5^{-2}.5^x+25.5^x=626.5^5\) tìm x
Bài 1:
a,11/125-17/18-5/7+4/9+17/14
b,(7+7/5-2/3)-(4+4/5+3/8)+(3-3/5+2/3+3/8)
c,-13/25.5/32.23/-13.(-64)
Bài 2:
a,11/13-(3/42-x)=-(13/28-11/13)
b,x2/3x+5/7=3/10
c,x-21/13x+1/3=-2/3
Bài1:tìm x, biết
a)|x|+|x+2|=0 b)|x(x^2-5)|=x
Bài2:tìm giá trị nhỏ nhất
a)|x+3|-|x-5| b)|x+5|+|x+2|+|x-7|+|x-8|
c)|x+3|+|x-2|+|x-5|
Bài3:Tìm Max của
A=|x+5|-|x-2|
Bài 4 : Tìm x biêt: (1-|x|).|1+x|>0
Bài 1. Tìm \(x\).
a) -5(\(x\)2-3\(x\)+1)+\(x \)(1+5\(x\))=\(x-2\)
b) \(12x\)2\(-4x\)\((3x+5)\)\(=10x-17\)
c) \(-4x(x-5)+7x(x-4)-3x\)2\(=12\)
Bài 2. Tính ( Rút gọn).
a) \((x+5).(x-7)-7x.(x-3)\)
b) \(x.(x\)2\(-x-2)-(x-5).(x+1)\)
c) \((x-5).(x-7)-.(x+4).(x-3)\)
d) \((x-1).(x-2)-(x+5).(x+2)\)
Tìm x
a)(2/5)^x >(2/5)^3×(-2/5)^2
b)5^x+5^x+2=650
bai 5: tìm so nguyên x biết
a) (x-2)(x+5) <0
b) (5-x)(x+5) <0
c) (-3x-18)(7-x) >0
Tìm x
-5.(x + 1/5) - 1/2 (x - 2/3)= 3/2 . x - 5/6
tìm x biết:-7.(x+9)-3.(5-x)=2
b)3. (x+2) -6.(x-5)=2.(5-2x)