[填空题]
Consider the functioni uaef ;rw8i9.hf04+ bv8hs(aomuro4 f(x)=ln (2 x-1) . Let point A be the point on the curve wha04vbf+uor h4 mh o(8sere x=3 .
1. Write down the gradient of the curve at A .
2. The normal to the curve at A cuts the x -axis at P . find the coordinates of P . (a,b) a= b=
