Been stuck on this for hours. Can someone help me identify the problem? I can't seem to graph my second logarithmic function. Thanks.
The second Plot uses u[x] instead of u1[x], which is not defined. This version works:
u[x]
u1[x]
PS. the PlotStyle option should be
u2[x_] := 0.5 Log[x] + 0.8 Log[6] Plot[{u2[x], u1[x]}, {x, 0, 10}, PlotStyle -> {{Blue, Thickness[0.01]}, {Red, Thickness[0.01]}}]