f x x to the second power 2x use X 11192735 f x x to the se

Solution

You mean this function? f(x) = x²/2x using 11,19,27 and 35 as values of x right?. If this the case then:
f(11) = 11² / 2(11) = 11/2 or 5.5
f(19) = 19² / 2(19) = 19/2 or 9.5
f(27) = 27² / 2*27 = 27/2 or 13.5
f(35) = 35² / 2*35 = 35/2 or 17.5

Hope this helps