10-{[(x:3+17):10+3.16]:10}=5
có thể viết rõ hơn ko mình ko hiểu
Tim x
a) \(3^7+4.3^6=7.3^x\)
b)\(2^x+3=4^3.8^4.16^5\)
c)\(2^{2.x}-3=4^{10}.8^3.16^5\)
d)\(3^{2.x}+3:9^3=9^{14}\)
e) \(\left(-5\right)^3-x=25^{10}:\left(-5\right)^{17}\)
a)37+4.36=7.3x
36.3+4.36=7.3x
(3+4).36=7.3x
7.36=7.3x
=>x=6
(5.4^11-3.16^5):4^10=
=( 5 . 4 ^11 - 3. 4^2.5 ) : 4^10
= ( 5 . 4^11 - 3 . 4^10 ) : 4^10
= 4^10 ( 5.4 - 3 ) : 4^10
= 5.4 - 3
= 17
ĐÚng cho mình nha
(5.4^11-3.16^5):4^10=
5.411-3.4.45):410
=( 5 . 4 ^11 - 3. 4^2.5 ) : 4^10
= ( 5 . 4^11 - 3 . 4^10 ) : 4^10
= 4^10 ( 5.4 - 3 ) : 4^10
= 5.4 - 3
= 17
ĐÚng cho mình nha
Tìm x
\(\dfrac{2^{2x-3}}{4^{10}}\)=\(8^3.16^5\)
\(\dfrac{2^{2x-3}}{4^{10}}=8^3.16^5\)
=> \(2^{2x-3}:4^{10}=8^3.16^5\)
=> \(2^{2x-3}.\left(2^2\right)^{10}=\left(2^3\right)^3.\left(2^4\right)^5\)
=> \(2^{2x-3}:2^{20}=2^9.2^{20}\)
=> \(2^{2x-3}:2^{20}\) = 229
=> \(2^{2x-3-20}=2^{29}\)
\(\Leftrightarrow\) \(2x-3-20=29\)
=> \(2x-3=29+20\)=49
=> \(2x=49+3\) = 52
=> \(x=52:2\) => x=26
BT1: Tìm x\(\in\)N biết
1) \(\dfrac{2^{2x-3}}{4^{10}}=8^3.16^5\)
\(\dfrac{2^{2x-3}}{4^{10}}=8^3.16^5\)
\(\Rightarrow2^{2x-3}=8^3.16^5.4^{10}\)
\(\Rightarrow2^{2x-3}=2^9.2^{20}.2^{20}\)
\(\Rightarrow2^{2x-3}=2^{49}\)
Vì \(2\ne\pm1;2\ne0\) nên \(2x-3=49\)
\(\Rightarrow2x=52\Rightarrow x=26\)
Vậy..........
Chúc bạn học tốt!!!
\(\left(5.4^{11}-3.16^5\right)\div4^{10}\)
(5*411-3*165):410
=[5*(22)11-3*(24)5)]:(22)10
=[5*222-3*220]:220
=[5*22*220-3*220]:220
=[20*220-3*220]:220
=220[20-3]:220
=17
(5.411-3.165) : 410 = 17 nha Trần Quỳnh Mai
\(\left(5.4^{11}-3.16^5\right):4^{10}=17\)
nha bạn ^_^
Trần Quỳnh MaiTìm x, biết:
a)\(\frac{2^{2x-3}}{4^{10}}=8^3.16^5\)
b)7.2 x =2 9+5.2 8
a, Tự chép đề bài :v
=> 22x-3 = ( 83. 165 ) : 410
22x-3 = ( 29. 220 ) : 220
22x-3 = 229 : 220
22x-3 = 29
=> 2x - 3 = 9
2x = 9 + 3
2x = 12
x = 6
Vậy....
b, 7. 2x = 29 + 5. 28
7. 2x = 1792
2x = 1792 : 7
2x = 256
2x = 28
=> x = 8
Vậy ....
a \(\frac{2^{2x-3}}{4^{10}}=8^3.16^5\)
\(\Leftrightarrow\frac{2^{2x-3}}{4^{10}}=2^{29}\)
\(\Leftrightarrow2^{2x-3}=2^{29}.4^{10}\)
\(\Leftrightarrow2^{2x-3}=2^{49}\)
\(\Leftrightarrow2x-3=49\)
\(\Leftrightarrow x=26\)
b \(7.2^x=2^9+5.2^8\)
\(\Leftrightarrow7.2^x=2^8.(2+5)\)
\(\Leftrightarrow7.2^x=7.2^8\)
\(\Leftrightarrow x=7\)
tim x biet
3/(x+2).(x+5) + 5/(x+5).(x+10) + 7/(x+10).(x+17) = x/(x+2).(x+17)
Với x thuộc tập hợp A = -2;-5;-10;-17