(1)
f(0)=f(0*y)=f(0)^y y为任意实数
f(0)^(y-1)=1
f(0)=1
(2)
f(1/3)=f(1*1/3)=f(1)^(1/3)>1
f(1)>1
f(x)=f(1*x)=f(1)^x
(3)
f(x)为增函数
3^x>9^x-3^(x+1)-2K
(3^x)^2-2*3^x-2K
(1)
f(0)=f(0*y)=f(0)^y y为任意实数
f(0)^(y-1)=1
f(0)=1
(2)
f(1/3)=f(1*1/3)=f(1)^(1/3)>1
f(1)>1
f(x)=f(1*x)=f(1)^x
(3)
f(x)为增函数
3^x>9^x-3^(x+1)-2K
(3^x)^2-2*3^x-2K