6. $h(x)=1$, find $x$

Step 1 ：Given the function h(x) = 1

Step 2 ：Since h(x) is a constant function, it has the same value for all x

Step 3 ：\( \boxed{\text{Final Answer: There are infinitely many solutions for } x \text{ since } h(x) = 1 \text{ for all values of } x} \)