Mathematics
Senior High
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5
次の等式が成り立つことを証明せよ。
(1) (*2-y2(22一09=ニ(gz*一6y”ー(2メーg7パ
(2②) 2+2Tc=0のとき g?十6?十6?三gc
(⑬ ーーニーアー = のとき ogx寺9十cz三0
2一c c一@ @一の
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