Range of the function $$f(x)=3+2^x+4^x$$ is

If $$f(x)=[8 x]-3$$, where $$[x]$$ is greatest integer function of $$x$$, then $$f(\pi)=$$ (where $$\pi=3,14$$)

The domain of the function $$f(x)=\sqrt{x-1}+\sqrt{6-x}$$ is

If f(x) = 3[x] + 5{x + 1}, where [x] is greatest integer function of x and {x} is fractional part function of x, then f($$-$$1.32) =