x-5:5.3+1=15
cơ hội nè
X+5>-3
Cơ hội kiếm điểm nè
X = -7;-6;-5;-4;-3;-2;-1;0;1;2;3;4;.........
Hok tốt ^.^
\(5.3^x=5.3^4\)
\(5.3^x=7.3^5-2:3^5\)
5.3x = 5.34
=> x = 4
5.34 = 7.35 - 2.35
= 35 . (7 - 2)
= 5. 35
=> 3x = 35
=> x = 5
a) Ta có: \(5\cdot3^x=5\cdot3^4\)
\(\Leftrightarrow3^x=3^4\)
hay x=4
a, \(5.3^x=5.3^4\)
b, \(5.3^x=7.3^5-2:3^5\)
c, \(5^{x+4}-3.5^{x+3}=2.5^{11}\)
d, \(2^x+2^{x+1}+2^{x+2}+2^{x+3}+2^{x+4}+2^{x+5}=480\)
Làm đầy theo tính ra kết quả thì mk với tik
c, \(5^{x+4}-3\cdot5^{x+3}=2\cdot5^{11}\)
\(\Leftrightarrow5^{x+3}\cdot5-3\cdot5^{x+3}=2\cdot5^{11}\)
\(\Leftrightarrow5^{x+3}\left(5-3\right)=2\cdot5^{11}\)
\(\Leftrightarrow5^{x+3}\cdot2=2\cdot5^{11}\)
\(\Leftrightarrow5^{x+3}=5^{11}\)
\(\Leftrightarrow x+3=11\)
\(\Leftrightarrow x=8\)
Vậy x = 8
d, \(2^x+2^{x+1}+2^{x+2}+2^{x+3}+2^{x+4}+2^{x+5}=480\)
\(\Leftrightarrow2^x\left(1+2+2^2+2^3+2^4+2^5\right)=480\)
\(\Leftrightarrow2^x\cdot63=480\)
\(\Leftrightarrow2^x=\frac{160}{21}\)
\(\Leftrightarrow x\approx2,93\)
bn nào trả lời hộ mk ik
đang gấp !!!
Tìm x
3^x-1 + 5.3^x-1 = 162
5^x + 5^x+2 = 650
3x-1+5.3x-1=162
=>3x-1.(1+5)=162
=>3x-1.6=162=>3x-1=162:6=27=33
=>x-1=3=>x=4
5x+5x+2=650
=>5x+5x.52=650
=>5x.(1+25)=650
=>5x.26=650=>5x=650:26=25=52
=>x=2
a, 2 \(\le\)|x+3|\(\le\)3
b, 4\(\le\)|4-x|\(\le\)5
c, 1 < |x+3| < 5
Ai nhanh mình tích , cơ hội kiếm điểm nè
a)2 _<[x+3]_<3 =>x E{0} ;b)4_<[4-x]_<5=>x E {0} ; 1<[x+3] <5=>x {0;1}
1 = 5
2 = 10
3 = 15
4= 20
5 = ?
Cơ hội kiếm điểm cho mấy bn nè
các bn chuẩn bị cơ hội nè
1+1=?
2+2=?
3+3=?
4+4=?
5+5=?
nhanh nhanh nhé!!!!!
1+1=2
2+2=4
3+3=6
4+4=8
5+5=10
nhớ nhé
a) 5x + 5x+2 = 650
b) 3x-1 + 5.3x-1 = 162
a) 5^x + 5^x+2 = 650
<=> 5^x. (1+5^2)= 650
<=> 5^x. 26= 650
<=> 5^x= 25
=> x= 2
b) 3^x-1 + 5.3^x-1 = 162
<=> 3^x-1. (1+5)= 162
<=> 3^x+1. 6= 162
<=> 3^x+1= 27
=> x+1= 3
=> x= 2
a 5.3^2023=50.3^2023-5.9^x
b, 2.3^x+5.3^x+1=153
a) 5.3²⁰²³ = 50.3²⁰²³ - 5.9ˣ
5.9ˣ = 50.3²⁰²³ - 5.3²⁰²³
5.(3²)ˣ = 5.3²⁰²³.(10 - 1)
5.(3²)ˣ = 5.3²⁰²³.9
3²ˣ = 3²⁰²³.3²
3²ˣ = 3²⁰²⁵
2x = 2025
x = 2025/2
b) 2.3ˣ + 5.3ˣ⁺¹ = 153
3ˣ.(2 + 5.3) = 153
3ˣ.17 = 153
3ˣ = 153/17
3ˣ = 9
3ˣ = 3²
x = 2