[微積] 高微一題
Let B = {x belongs to R^3,||x||<=1 }
Proof that if a,b belongs to B, then
|ac-bd| <= ||b-c|| + ||a-d||
for all c,d belongs to R^3
乘法都是R^3的內積~~~
這是小妹的其中一題作業，但想了一晚還是想不出來，懇請板上各位大大幫忙，告訴我
怎麼解或給些提示都可以T▽T
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