三角形abc,各对应边为a,b.c满足a4+b4+c4/2=a2c2+b2c2判断此三角形的形状
三角形abc,各对应边为a,b.c满足a4+b4+c4/2=a2c2+b2c2判断此三角形的形状
其他人气:381 ℃时间:2020-03-29 09:28:42
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a^4+b^4+c^4/2=a^2*b^2+b^2*c^22*a^4+2*b^4+c^4-2*a^2*b^2-2*b^2*c^2=0a^4+b^4+2*a^2*b^2+c^4-2*c^2(a^2+2*b^2)+a^4+b^4-2*a^2*b^2=0(a^2+b^2)^2+c^4-2*c^2(a^2+2*b^2)+a^4+b^4-2*a^2*b^2=0(a^2+b^2-c^2)^2+(a^2-b^2...
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