Tìm x E Q, biet:
a) (x+3/5).(x+2/3)*(x+2)<0
Những câu hỏi liên quan
tim x nguyen biet:
a 8.(x mu 2 +3).(5-x)
b)(2x + 1)mu 2=25
c) (1-3x)mu3 =64
d)(4-x)mu3 =-27
e) xmu2 -5x =0
b: \(\left(2x+1\right)^2=25\)
=>\(\left[{}\begin{matrix}2x+1=5\\2x+1=-5\end{matrix}\right.\)
=>\(\left[{}\begin{matrix}2x=4\\2x=-6\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=2\\x=-3\end{matrix}\right.\)
c: \(\left(1-3x\right)^3=64\)
=>\(\left(1-3x\right)^3=4^3\)
=>1-3x=4
=>3x=1-4=-3
=>x=-3/3=-1
d: \(\left(4-x\right)^3=-27\)
=>\(\left(4-x\right)^3=\left(-3\right)^3\)
=>4-x=-3
=>x=4+3=7
e: \(x^2-5x=0\)
=>\(x\left(x-5\right)=0\)
=>\(\left[{}\begin{matrix}x=0\\x-5=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=0\\x=5\end{matrix}\right.\)
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tim x biet:a)/x+1/+/3x-1/+/x-1/=3
b)/x-2/+/x-7/=4
|x+1|+|3x-1|+|x-1|=3
=} vs cả trong dấu giá trị tuyệt đối >0 thì=}
x+1+3x-1+x-1=3{=}5x=4{=}x=4/5
=}vs cả trong giá trị tuyệt đối <0 thì=}
x+1+3x-1+x-1=-3{=}5x=-4{=}x=-4/5
Cau 3 (2 diem). Tim so tu nhien x, biet:
a. 123 - x =38
b. (x+15) - 7 =33
c. 3x+3 - 13=230
`123-x=38`
`=> x= 123-38`
`=>x=85`
Vậy `x=85`
__
`(x+15) -7=33`
`=>x+15=33+7`
`=>x+16= 40`
`=>x=40-16`
`=>x=24`
Vậy `x=24`
__
`3^(x+3) -13=230`
`=> 3^(x+3) = 230+13`
`=>3^(x+3)=243`
`=> 3^(x+3)=3^5`
`=> x+3=5`
`=>x=5-3`
`=>x=2`
Vậy `x=2`
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Tim x biet:A. 2/3+x=-45%
B:x/5=5/6+-19/30.ai nhanh tay giai gium cho minh thi minh tick cho!
tim x biet:a.2x^2-1=17/8;b.(2x-0,05)(x+3)>0;c.(7-x)(x+19)>0
Tim cac so nguyen x,y biet:a)*x2 -3*x+1 chia het cho x+2 b)x2-xy = 5x-4y-9 c) (x2-8)*(x2-15)<0 d) (x+1)2+(y+1)2+(x-y)2=2 e) (x2-4)x2>0 ai lam truoc minh tick,mai minh di hoc rui,lam giup minh di pls Thank ban truoc ne ;(
Cho E=\(\frac{x\sqrt{x}-3}{x-2\sqrt{x}-3}-\frac{2\left(\sqrt{x}-3\right)}{\sqrt{x}+1}+\frac{\sqrt{x}+3}{3-\sqrt{x}}\)
a,rút gọn E
b, tính E khi X=\(14-6\sqrt{5}\)
c, tìm min E
c) ( x - 2/5 ) ( x + 3/7 ) = 0 . Tìm x E Q
c) ( x - 2/5 ) ( x + 3/7 ) = 0
=> x - 2/5 = 0 hoặc x + 3/7 = 0
=> x = 2/5 hoặc x = -3/7
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tìm x
a) 5 x-2(x-3) =1
b) \(\frac{x+1}{3-x}=\frac{2}{5}\)
c) 2+|1-2x| =5
d) \(x-\frac{2}{5}\left(3x+4\right)=0\)
e) \(2^x+2^{x+3}=144\)
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