What is the index of the quadratic form, (3x_1^2+ x_3^2+8x_{13}+ 9x_{ – McqOptions

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1.	What is the index of the quadratic form, (3x_1^2+ x_3^2+8x_{13}+ 9x_{21}+ 2x_{23}=0 )?
A.	2
B.	4
C.	3
D.	1
Answer» B. 4

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