Posted by Anonymous on .
what is the fuction for input 3 and output 16?

algebra 
MathMate,
"what is the fuction for input 3 and output 16?"
Should have read:
"what is a fuction for input 3 and output 16?" since many functions could fit the bill.
Examples:
f1(x)=x+13, so f1(3)=16
f2(x)=x²+7, so f2(3)=16
f3(x)=(x1)^4, so f3(3)=16
....