2-by-4
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2-by-4
8-by-2by-1/4-inch是什么意思
求代数式2(ax+by)(by-ax)-(ax+by)²-(ax-by)²的值,其中a=-4,a-x=-1.
实数a,b,x,满足ax+by=3,ax^2+by^2=7,ax^3+by^3=16,ax^4+by^4=42,ax^5+by^5=?
若a,b,x,y满足ax+by=3,ax^2+by^2=7,ax^3+by^3=16,ax^4+by^4=42,求ax^5+by^5的值
若a,b,x,y满足ax+by=3,ax^2+by^2=7,ax^3+by^3=16,ax^4+by^4=42,求ax^5+by^5的值
已知ax+by=7 ax²+by²=49 ax³+by³=133 ax^4+by^4=406已知ax+by=7 ax²+by²=49 ax³+by³=133 ax^4+by^4=406(1)求a+b ,x+y,xy的值(2)请问ax^5+by^5的值是有理数吗?(2)请问ax^5+by^5的值是有理数吗?
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