by=-13ax-4by=18搜索结果第2页,早教吧

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共找到 39490 与by=-13ax-4by=18 相关的结果，耗时9 ms

急a²-ab+ac-bc2ax-10ay+5by-bx3ax+4by+4ay+3bxm²+5m-mn-5nx²-y²+ax+aya²-2ab+b²-c²x³+x²y-xy²-y³4a²-b²+6a-3b9m²-6m+2n-n²x²-y²-z²+2yzx³-x²y-xy 数学

+y³

分解下列因式：（1）a²-b²+a-b（2）3ax-4by-4ay+3bx(3)3a³+6a²b-3a²c-6abc(4)(x+1)²-(y-3)²(5)4(x+y)²-16(a-b)²(6)(x²-3x)²-2(x²-3x)-8(7)x(x+3)(x+2)(x+1) 数学

1

两圆x2+y2+2ax+a2-4=0和x2+y2-4by-1+4b2=0恰有三条公切线，若a∈R，b∈R，且ab≠0，则1a2+1b2的最小值为（）A．19B．49C．1D．3 数学

1 9

初三二次函数1.对于二次函数y=ax^2+bx+c,若b^2=ac,且当x=0时,y=-4,则Ay有最大值,最大值为-4By有最小值,最小值为-4Cy有最大值,最大值为-3Dy有最小值,最小值为-32.把抛物线y=x^2+bx+c的图象向右平数学

位,再向下平移三个单位,所得

图像经过点p(1,-1)的函数是（）Ay=3x-4By=x的平方+x-1Cy=3÷（x+2）Dy=（2x的平方-x+1）÷（x的平方+2x-3）数学

I go to school on foot.She goes to school by bike.he goes to school by subway.I go to school on foot.She goes to school by bike.he goe 英语

to school by

The car was invented by him.对him进行提问怎么变?是by whom was the car invented?还是 whom was the car invented by?还是 by whom the car was invented? 英语

是以上都不对希望给出详解.b

若abxy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的值数学

1.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2.已知等式k²x+2(k-1)y+(2-k-k²)z=1与k值无关,求x,y,z的值数学

a+b+c=252a-3b+2c=15,求b已知5x+y=3与x-2y=5ax=5y=45x+by=1有相同的解,求a、b的值2│5X-2y-3│+（x+6y-11）=0成立,求x、y的值m为何值时,3x-5y=2m的解互为相反数,并求出它们的解2x+7y=m-18已知其他

18已知△ABC中,∠B的平

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