若9²·27·3^5=3^x,则x=________;若10^m=2,10^2m+n=12,则10^n=________.
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/05 15:53:15
![若9²·27·3^5=3^x,则x=________;若10^m=2,10^2m+n=12,则10^n=________.](/uploads/image/z/603050-50-0.jpg?t=%E8%8B%A59%26%23178%3B%C2%B727%C2%B73%5E5%3D3%5Ex%2C%E5%88%99x%3D________%EF%BC%9B%E8%8B%A510%5Em%3D2%2C10%5E2m%2Bn%3D12%2C%E5%88%9910%5En%3D________.)
若9²·27·3^5=3^x,则x=________;若10^m=2,10^2m+n=12,则10^n=________.
若9²·27·3^5=3^x,则x=________;若10^m=2,10^2m+n=12,则10^n=________.
若9²·27·3^5=3^x,则x=________;若10^m=2,10^2m+n=12,则10^n=________.
9²·27·3^5
=3^4*3^3*3^5
=3^12
=3^x
x=12
10^2m+n
=(10^m)^2+n
=4+n=12
n=8
10^8=100,000,000
10^(2m+n)
=(10^m)^2*10^n
=4*10^n=12
10^n=3
x=12;10^n=3
搜“肚子疼”试试看