問(wèn)答題證明:對(duì)任意m×n矩陣A,ATA與AAT都是對(duì)稱(chēng)方陣;而當(dāng)A為n階對(duì)稱(chēng)方陣時(shí),則對(duì)任意n階方陣C,CTAC為對(duì)稱(chēng)方陣。

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