integrate 1sqrtx dx from x1 to 4 I have done the work by han

integrate (1/sqrt(x)) dx from x=1 to 4
I have done the work by hand and came up with two different answers. My work is very flawed but the first time I came up with 1/2 and then the second time I came up with 2. Can somebody show the steps to the solution so I can find my mistake. Thank you!