Question

Giải chi tiết

Answer 1

lần sau 1 lần 1 bài thôi

B1

\(a,\rightarrow12x-33=3^{2015-2014}=3^1=3\\ 12x=3+33=36\\ x=36:12\\ x=3\)

\(b,\rightarrow10+2x=4^{2023-2021}=4^2=16\\ 2=16-10=6\\ x=6:2=3\)

\(c,\rightarrow2^x.1+2^x.2^2=80\\ 2^x.\left(1+4\right)=80\\ 2^x.5=80\\ 2^x=80:5=16\\ 2^x=2^4\\ \rightarrow x=4\)

\(c,\rightarrow5^{19-x}:5^3=5^7\\ \rightarrow5^{19-x}=5^7.5^3=5^{7+3}=5^{10}\\ \rightarrow19-x=10\\ x=19-10\\ x=9\)

B3

\(a,=x^{1+2+3}=x^6\\ b,=\left(5^2\right)^4.5^1:\left(5^3\right)^2=5^8.5^1:5^6=5^{8+1-6}=5^3\)

\(c,=2^{12}:\left(2^3\right)^3=2^{12}:2^9=2^{12-9}=2^3\)