若2^x=49,2^y=7,则2^(x-y)=___________________
问题描述:
若2^x=49,2^y=7,则2^(x-y)=___________________
如题
答
2^(x-y)=2^x/2^y=49/7=7
若2^x=49,2^y=7,则2^(x-y)=___________________
如题
2^(x-y)=2^x/2^y=49/7=7