证明:如果b方=ac,则(a+b+c)(a-b+c)(a方-b方+b方)=a四次方+b四次方+c四次方
证明:如果b方=ac,则(a+b+c)(a-b+c)(a方-b方+b方)=a四次方+b四次方+c四次方
数学人气:106 ℃时间:2020-04-19 06:29:29
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(a+b+c)(a-b+c)=(a+c)² - b² = a² + c² + 2ac - b² = a² + b² + c² 左式=(a² + b² + c²)(a² - b² + c²)=(a² + c²)² - b^4=a^4 + c^4 + 2a&sup...
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