英语翻译1.which of the following is equivalant to the equation x
英语翻译
1.which of the following is equivalant to the equation x^2+5x+y^2-1=0 in polar form?
2.if A is a 2*3matrix ,and B is 3*4matrix,then the product of A times 3B is a matrix of which of the flolling dimensions?
1.which of the following is equivalant to the equation x^2+5x+y^2-1=0 in polar form?
2.if A is a 2*3matrix ,and B is 3*4matrix,then the product of A times 3B is a matrix of which of the flolling dimensions?
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1.下面的（数字）哪一个在极坐标形式中满足等式x^2+5x+y^2-1?
2.如果A是一个2*3的矩阵,B是一个3*4的矩阵,那么A乘以3B得到的矩阵的维度是下面的哪一个?
2.如果A是一个2*3的矩阵,B是一个3*4的矩阵,那么A乘以3B得到的矩阵的维度是下面的哪一个?
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第一题答案是r^2+5rcosθ-1=0 第二题答案是3*3 求详细过程?
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