ax+by=3 ax平方+by平方=7 ax立方+by立方=16 ax四次方+by四次方=42 ax五次方+by五次方=?
ax+by=3 ax平方+by平方=7 ax立方+by立方=16 ax四次方+by四次方=42 ax五次方+by五次方=?
数学人气:277 ℃时间:2020-05-24 08:37:27
优质解答
(ax^2+by^2)(x+y)=ax^3+by^3+xy(ax+by)即:7(x+y)=16+3xy.(1)(ax^3+by^3)(x+y)=ax^4+by^4+xy(ax^2+by^2)即:16(x+y)=42+7xy.(2)解(1)(2)联立的方程组得:(x+y)=-14xy=-38(ax^4+by^4)(x+y)=ax^5+by^5+xy(ax^3+by^...
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