Question

若10^m=2,10^n=3,10^(2m+3n)=

Answer 1

若10^m=2,10^n=3,10^(2m+3n)=

解:10^(2m+3n)= 10^2m乘以10^3n

=(10^m)^2乘以(10^n)^3

=2^2乘以3^3

=4乘以27

=108

若3x+5y-4=0,则8^x*32^y=

解:8^x*32^y=(2^3)^x*(2^5)^y

=2^3x*2^5y

=(2)^3x+5y

=(2)^4

=16