练习册

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  • 试题
    Find the matrix products in the following questions: (i) (ii) (iii) (iv) (v) (vi) INVERSE MATRICES An important aspect of matrices is the ability to be able to find the inverse of the matrix. This replaces the idea of division. If the first step to finding its inverse is to calculate the determinant. The determinant is represented by . The inverse of A is then given by: or eg. If then Then Then we can check what the advantage of the inverse is: The Unit matrix. Type in the matrix you are working with: Use the ANS feature to find the inverse: Check that when you multiply the original and the inverse together that the unit matrix is produced. Note ans(2) is the second last answer! Exercise 3: 【查看更多】

     

    题目列表(包括答案和解析)

    以下是用Scilab编写的程序，输出a，b的含义是________________．

    a=input(“please give the first number”)

    b=input(“please give the second number”)

    while　a＜＞b

    　　　if　a＞=b

    　　　　a=a－b；

    　　　else

    　　　　b=b－a；

    　　end

    end

    print(％io(2)，a，b)

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    以下是用Scilab编写的程序，输出a，b的含义是________________．

    a=input(“please give the first number”)

    b=input(“please give the second number”)

    while　a＜＞b

    　　　if　a＞=b

    　　　　a=a－b；

    　　　else

    　　　　b=b－a；

    　　end

    end

    print(％io(2)，a，b)

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    i是虚数单位，
    5i
    2-i
    =（　　）
    A、1+2iB、-1-2i
    C、1-2iD、-1+2i

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    若f（tanx）=cos2x，则f(-tan
    π
    3
    )    的值是（　　）
    A、
    1
    2
    B、-
    		3
    2
    C、-
    1
    2
    D、
    		3
    2

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    过点A（a，a）可作圆x2+y2-2ax+a2+2a-3=0的两条切线，则实数a的取值范围为（　　）
    A、a＜-3或1＜a＜
    3
    2
    B、1＜a＜
    3
    2
    C、a＜-3
    D、-3＜a＜1或a＞
    3
    2

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