[填空题]
The values of the functions f w)i hr.a x1wbca0+0 qhand g and their derivatives for x=2, x=3 ut ogxiv102lj ):3no cand x=6 are shown in the follow 1l )jotnx2:gcuvi3 0oing 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 .
