• 2022-05-28
    已知二向量[tex=5.786x1.357]I7XvfhDm7qmNlahUCNH41SuUoJ+a9KNgNcuJNqsnOiXqoUlLJ3IB8+P45wdSKQaY[/tex], [tex=5.429x1.357]Jh8cTa7339l4Ly1AD1G3rxHEX0+lVmhKk7V5X40TkzTbirvQye0+Es7RBsgC9QC8[/tex], 试证:①[tex=11.714x1.214]3bQznqFN8Jk+OvSd3shvxvY8T2244jQK05tgW4NcMv8J+zsj5iW5oRZm1vO19R9r8DKWBzS8nKwl2efn2JORcyHQPJJQMy1cR/xrBOpKNLw=[/tex];[br][/br]②[tex=8.643x2.286]DhunIUpfDo97u1riEZhEFDb6x+ZQIlJUvY9/y+d9OxIM2jBo/+dHqm1lTBir0dXRYlXR39YfwHvFIWNovQDgGsq4vROIxReqZY/XAOModyFd61uAE+7ak7at0P2xk9i5[/tex].