1003024904

SubArea: 
Exponential functions
Level: 
B
Project ID: 
1003024904
Accepted: 
1
Clonable: 
0
Easy: 
1
Which of the following functions is decreasing?
\( f(x)=\left(\frac15\right)^x \)
\( f(x)=-5^{-x} \)
\( f(x)=\left(\frac15\right)^{-x} \)
\( f(x)=5^x \)