(2x+1)^4=(2x+1)^6
vay 2x+1=0hoac1
vay x=0 hoac x=-1/2
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.Tim x:
1. /x+1/+/x+3/=5
2. /x+1/+/x-2/+/x+3/=6
3. /2x-3/+/2x-5/=2
4. /x-5/-/x-6/=1
5. 2*/x+2/+/4-x/=11
6. /x-1/+/4-x/=3
7. /2x+5/+/2x-3/=8
tim x
a/ (5x -1)^6 =729
b/(2x+1)^3=0,001
c/(2x-3)^4=(2x-3)^6
d/(2x+1)^5=(2x+1)^2010
tim x
(2x -1)6= (2x-1)8
1)tim x bit a)(1/2-1/3).6^x+6^x+2=6^15+6^18
b)3^x+3^x+2=2430
c)(2x-15)^5=(2x-15)^3
2) so saanh
a)2^11 va 5^35
b)2^31 va 3^21
c)2^15 va 27^5.49^8 d)21^15 va 27^5.49^8
tim x biet 2x+1/x-2=2x-3/x+6
tim x trong cac ti le thuc sau:
a, ..
-0,75/x=-1/1/2/-4/5 b, -1/3x+1/2/-5/4=-2/2/5/0,35 c, 2x-4/3=6/x-1 d, 2x-1/x+3
a) (2x-1)^4=8^1
b) (x-1)^5= -32
c) 2^x +2^x+3=144
d) (2x-1)^6=(2x-1)^8
e) (x-7)^x+3 -(x-7)^x+1=0
tìm x :
a) | x-3 | + | 2x-6 | =8
b) | x-1 | - 5| 1-x | = -20
c) | 2x-3 | = 6-| 3-2x |
d) | 3x-2 | - | 6-9x | = -|-16|
Giải hộ mik với !!! ( ai nhanh tay thì thì mik sẽ tick ) TKS
tìm x:
a,8/x = x/4
b,2x/3 = -4y/7 va x + 4/y = 6
c,2x+3/6 = x+1/-8