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【单选题】
已知矩阵A=[1 2 3;4 5 6;7 8 9],计算矩阵A的行列式及逆矩阵，应该调用什么函数指令？A.
det(A) inv(A)
B.
rank(A) inv(A)
C.
det(A) rank(A)
D.
eig(A) rank(A)
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