These have built up over the week and im wondering u have can answer them for me please
1) S(b=5, a=1) xdx/(sqrt(3x+1) using u^2=3x + 1
2) S(b=1, a=0) dx/[x^1/4(1+x^3/4] using u=1 + x^3/4
3) S(b=2, a=0) dx/[(5-2x)^2] using u=5 - 2x
4) Using u = 3x01, find the area bounded by...