Let \($f(x)=\left\lfloor\left(-\frac58\right)^x\right\rfloor$\) be a function that is defined for all values of \(x\) in \([0,\infty)\) such that \(f(x)\) is a real number. How many distinct values exist in the range of \(f(x)\)?

Please reply quickly.

There are only two values in the range, -1 and 0.