[填空题]
The values of the functions f2 ldw2x0wa ;yq l8n3,cccua1n and g and their dnmn aalhca215/sure p2sp+ 12erivatives for x=2, x=3 and x=6 are shoa1+22ps sm e/lnc urhp15a2nawn in the following table.
1. Evaluate $\int_{2}^{3} g^{\prime \prime}(x) \mathrm{d} x $.
2. Let $k(x)=\frac{f(x)}{g(x)}$ . Find $k^{\prime}(2)$ .
3. Let $h(x)=f(g(x))$ . Find the equation of the tangent to h at x=6 .
