từ đầu bài sẽ ra:
(4^5*4)/(3^5.3) . (6^5.6)/(2^5.2)=8^x
4^6/3^6 . 6^6/2^6=8^x
4^6.6^6/3^6.2^6= 8^x
4^6.6^6/6^6=8^x
4^6=8^x
2^12=2^3x
3x=12
x=4
vậy x=4
nhìn hơi khó hiểu bạn thông cảm
\(=\frac{4\left(4^5\right)}{3\left(3^5\right)}.\frac{6\left(6^5\right)}{2^{10}}=8^x\)
\(=\frac{2^{12}}{3^6}.\frac{2^6.3^6}{2^{10}}\)= 8x
\(=\frac{2^{18}.3^6}{3^6.2^{10}}\)= 8x
\(=2^8=8^x\)
=> x vô nghiệm
Mk giải hơi bị ngắn nha1 Mong bạn hiểu XD
Hk tốt
\(\frac{4^5+4^5+4^5+4^5}{3^5+3^5+3^5}.\frac{6^5+6^5+6^5+6^5+6^5+6^5}{2^5+2^5}=8^x\)
\(=\frac{4.4^5}{3.3^5}.\frac{6.6^5}{2.2^5}=8^x\)
\(=\frac{4^6.6^6}{3^6.2^6}=8^x\)
\(=\frac{4^6.6^6}{6^6}=8^x\)
\(=\frac{4^6.6^6}{4^6}=8^x\)
\(=2^{12}=2^{3x}\)
\(\Rightarrow3x=12\)
\(x=12\div3\)
\(x=4\)
