Posted by Anonymous on .
integrate 1/x dx w.r.t x
answer should be log(x) or ln(x)
and why

mathsurgently needed 
Steve,
because d/dx log(x) = 1/x,
∫dx/x = log(x)+C
is that why enough, or is there yet something missing?
And, maybe you haven't seen the old chestnut
∫d(cabin)/cabin = log cabin + C = houseboat