Question

已知k>1,且a-b=2k,a^2+b^2+c^2=2k^2,a^2c^2+b^2c^2=k^4+2k^2,则以a,b,

Answer 1

题目好象有问题,a-b=2k则(a-b)^2=4k^2,带入a^2+b^2+c^2=2k^2得4k^2+2ab+c^2=2k^2得2ab+c^2=-2k^2