2.6 × x =22.178
Tìm x :
11.6x-1+2.6x+1=11.611 + 2.613
=> \(11.6^{x-1}+2.6^{x-1+2}=11.6^{11}+2.6^{11+2}\)
=>\(11.6^{x-1}+2.6^{x-1}.6^2=11.6^{11}+2.6^{11}.6^2\)
=>\(6^{x-1}\left(11+2.6^2\right)=6^{11}\left(11+2.6^2\right)\)
=>\(6^{x-1}=6^{11}\)
=>\(x-1=11\)
=>\(x=12\)
Tíck giùm mik nha !
Tìm x
a, (x-2)^5=(x-2)^3
b,(x-3)^3=(x-3)^2 c,11.6^x-1+2.6^x+1 =11.6^11+2.6^13
d, 6.8^x-1+8^x-1=6.8^19+8^21
a: =>(x-2)^3*[(x-2)^2-1]=0
=>(x-2)(x-3)(x-1)=0
=>\(x\in\left\{1;2;3\right\}\)
b: =>(x-3)^2*(x-3-1)=0
=>(x-3)(x-4)=0
=>x=3 hoặc x=4
c: =>\(11\cdot\dfrac{6^x}{6}+2\cdot6^x\cdot6=6^{11}\left(11+2\cdot6^2\right)\)
=>6^x(11/6+12)=6^12(11/6+12)
=>x=12
[x-3.4]+[2.6-x]=0
8 mà vẫn tranh thủ lm bài
bái phục
lm sư phụ con nhà (qà là ****) Nguyễn Ngọc Quý
| x - 3.4 | + | x - 2.6 | = 0 tìm x
|x-3,4|>0
|x-2,6|>0
=>|x-3,4|+|x-2,6|>0
mà theo đề:|x-3,4|+|x-2,6|=0
=>|x-3,4|=|x-2,6|=0
=>x=3,4;x=2,6
ko thể tồn tại 2 giá trị x cùng lúc
=>x thuộc rỗng
tick nhé
Tìm x: 46.54-2.6*x=38.428
\(46,54-2,6\times x=38,428\)
\(\Leftrightarrow2,6x=46,54-38,428\)
\(\Leftrightarrow2,6x=8,112\)
\(\Leftrightarrow x=\dfrac{8,112}{2,6}\)
\(\Leftrightarrow x=3,12\)
Vậy x = 3,12
[x+3/4]-[2.6-x]=0
34.6 x 12.7 - 34.6 x 2.6 -34.6
34,6 x 12 ,7 - 34,6 x 2,6 - 34,6
= 34,6 x ( 12,7 - 2,6 - 1 )
= 34,6 x 314,86
34.6 x 12.7 - 34.6 x 2.6 -34.6
=439,42-89,96-34,6
=349,46-34,6
=314,86
Tìm x:
a/4x+3 - 3.4x+1 = 13.411
b/11.6x-1 + 2.6x+1 = 11.611 + 2.613
\(\text{a) Ta co }\) \(4^{x+3}-3.4^{x+1}=13.4^{11}\)
\(\Rightarrow\) \(4^{x+1}\left(16-3\right)=13.4^{11}\)
\(\Rightarrow4^{x+1}.13=13.4^{11}\)
\(\Rightarrow4^{x+1}=4^{11}\)
\(\Rightarrow x+1=11\)
\(\Rightarrow\text{x=10}\)
a)
\(4^{x+3}-3.4^{x+1}=13.4^{11}\)
<=> \(4^{x+1}\left(16-3\right)=13.4^{11}\)
<=> \(4^{x+1}.13=13.4^{11}\)
<=> \(4^{x+1}=4^{11}\)
<=> \(x+1=11\)
<=> x=10
14.5-x bằng 2.6 nhân 3.7
14,5 - x = 2,6 x 3,7
14,5 - x = 9,62
x = 14,5 - 9,62
x = 4,88
14,5 - x = 2,6 x 3,7
=> 14,5 - x = 9.62
=> x = 14,5 - 9.62
=> x = 4,88