[填空题]
Consider the function f(x)=ln (2 x-1) . Let point A be xu2t97ak x)wxthe point qi(b/ - 37zkcncx.ojx on the curve where x=.7i(/kqxb o -xj 3zccn3 .
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=
