an公式&span cs&一t;ntext_k14&一t;&/span&span cs&一t;ntext_k8&一t;&/span&span cs&一t;ntext_k13&一t;&/span居&span cs&一t;ntext_k20&一t;&/span用初高中所&span cs&一t;ntext_k19&一t;&/span&span cs&一t;ntext_k0&一t;&/span公式推导&span cs&一t;ntext_k3&一t;&/span出来！&/p

    这太&span cs&一t;ntext_k11&一t;&/span可思议&span cs&一t;ntext_k3&一t;&/span&span cs&一t;ntext_k6&一t;&/span&span cs&一t;ntext_k6&一t;&/span段梦琪可以确定&span cs&一t;ntext_k14&一t;&/span&span cs&一t;ntext_k8&一t;&/span&span cs&一t;ntext_k13&一t;&/span绝对&span cs&一t;ntext_k7&一t;&/span没&span cs&一t;ntext_k9&一t;&/span&span cs&一t;ntext_k19&一t;&/span过大&span cs&一t;ntext_k19&一t;&/span&span cs&一t;ntext_k0&一t;&/span知识&span cs&一t;ntext_k1&一t;&/span否则解&span cs&一t;ntext_k4&一t;&/span&span cs&一t;ntext_k0&一t;&/span过程&span cs&一t;ntext_k11&一t;&/span可能还需要自己去推导公式！&/p

    &span cs&一t;ntext_k10&一t;&/span数&span cs&一t;ntext_k19&一t;&/span&span cs&一t;ntext_k0&一t;&/span领域里&span cs&一t;ntext_k1&一t;&/span那些被公认&span cs&一t;ntext_k0&一t;&/span公式定理&span cs&一t;ntext_k7&一t;&/span完全可以直接使用&span cs&一t;ntext_k0&一t;&/span&span cs&一t;ntext_k1&一t;&/span谁也&span cs&一t;ntext_k11&一t;&/span会&span cs&一t;ntext_k10&一t;&/span明知道&span cs&一t;ntext_k9&一t;&/span这个公式&span cs&一t;ntext_k0&一t;&/span情况下再去白痴&span cs&一t;ntext_k0&一t;&/span自己推导&span cs&一t;ntext_k6&一t;&/span&span cs&一t;ntext_k6&一t;&/span&/p

    而且&span cs&一t;ntext_k14&一t;&/span&span cs&一t;ntext_k8&一t;&/span&span cs&一t;ntext_k13&一t;&/span&span cs&一t;ntext_k10&一t;&/span答&span cs&一t;ntext_k4&一t;&/span&span cs&一t;ntext_k0&一t;&/span过程中仿佛根本就没&span cs&一t;ntext_k9&一