Mathematics
Undergraduate
(ⅲ)の証明を教えて欲しいですm(_ _)m
[3]: V を内積空間とする。
(1) a, 6EVとする。このとき次を示せ。
(ii) ||a + |? + ||a- b||? = 2(||a||° +|||).
(ii) ||a|| = ||| +0ならば, ||a + b| +0または||a -b|| + 0.
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