已知10^x=4,10^y=5(1)求10^2x+10^3y的值(2)求10^2x+3y的值

问题描述:

已知10^x=4,10^y=5(1)求10^2x+10^3y的值(2)求10^2x+3y的值

(1) 10^2x+10^3y = (10^x)^2 + (10^y)^3 = 4^2 + 5^3 = 16 + 125 = 141
(2) 10^(2x+3y) = (10^2x)*(10^3y) = [ (10^x)^2 ]* [ (10^y)^3] = 16*125=2000