15. Evaluate the integral for by making an appropriate change of variables, where R is given by the inequality |xl+|y|≤.1 .(10%)
14. Find the Maclaurin series of the function and its radius of convergence. (10%)
13. Find the volume of the parallelepiped determined by vectors (10%)
48. 下列有關下圖中構造的敘述,何者不正確? (A) A 處細胞質內的滲透壓為中柱內最大,可使水分持續流入 (B) 支根可由 C 處經細胞分裂而突出 F (C) D 具有不透水的卡氏帶,可限制水溶液需經過細胞膜再進入中柱 (D) 乙路徑的運輸會經過皮層細胞的原生質絲