[填空题]
A function f satisfies the conditions f(0)=ln 2, f(1)=0 anl2: 8 axyil-uld inx5n 2dh99x.g-d yva/ wui8f( d3 v0giy znhf0ts second derivative is (dha wfx8n-d0iyxv0fn5vg93i./ zu h9d2 ngy $f^{\prime \prime}(x)=40 x^{\frac{2}{3}}+(x+1)^{-2}$,$ x \geq 0$ . Find f(x) .