5.3x=5.34
<=> 3x=34( chia cả hai vế cho 5)
<=> x=4
7.3x=5.37+2.37
<=> 7.3x=37.(5+2)
<=> 7.3x=37.7
<=> 3x=37(chia cả hai vế cho 7)
<=> x=7
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
\(5.3^x=5.3^4\)
\(5.3^x=7.3^5-2:3^5\)
Rút gọn các phân số sau:
a) − 7 .3 + 4. − 6 − 5 .3 + 2.3
b) 3.6 + 2.9.5 − 18. − 4 7. − 7 + 12. − 7 + 7
tìm x
a) 2(x-51)= 20.24+5.22
b) 225 : ( x- 19) = 25
c) 4. (x-3)= 7^2-1^0
d) 3^3(x+4) - 3.5^2= 15.2^2
e) 2.x-7^2=5.3^2
f) 2^3.5^2-(2x+6)=4^3
g) 135-5(x+4)=35
h) 75+9(x-8)=318
tim x biet
X+35=-22-X
(6X-4^2) .7^8=2.7^9
5.3^x-1-7.3^12=8.3^12
3.(x-15)^3=-24
lx+18l=10
tìm x biết:
x^2-4x=0
4x-(3+5x)=14
-7^5.3^3/ 7^2.(-3)^3
a 5.3^2023=50.3^2023-5.9^x
b, 2.3^x+5.3^x+1=153
2^2.4^4.2^6.2.2=
2.2^3.2^7.2^4=
3^2.3=
3^4.3^3.3=
3.3^5.3^4.3^2=
3.3^6.3^7.3^4=
4.4^3=
4^5.4.4^7=
4.4^3.4^5.4^6=
5.5^6
5.5^4=
5.5^2.5^4=
5.5^3.5^4.5^6=
5.5^6.5^4.5^3=
x.x^2
x.x^3.x^5=
a.a^4
a.a^2.a^4.a^5.a^7=
a.a^3.a^5.a^6
a^4.a.a^5.a^6.a=
x.x^3.x^4=
x^5.x^4.x.x^7.x^6=
7.7^2=
7.7^2.7^4.7^5=
7^3.7^5.7.7^4=
7^2.7.7^6.7^6.7^3=
10.10^2=
10.10^2=
10.100.10^3=
10.100.10^4.1000=
10^2.10^4.100.1000=
bài 1 : thực hiện phép tính sau:
a ) 18^2 : 9^2 .2^2 +12-12:3
b) 5! +2^10 :2^8
c)28 :[ 117 - ( 117- 4) ] . 7 + 5^3 :125
d)3^3. 3^5.3 +2^7 ;64
bài 2: tìm x thuôc N biết
a) (2x -2^5). 5^3=2^3.5^3
b) 2^2x -4= 72:3^2
c)3^x + 3^x+1 =108
d)(x -3).(3x+5) =0
