[1/V14 2/7 2/V14 -4/7 1//21 5/7 [3/V14 2/7 -2//21 [1 4 8 4//21 [14/V14 28/V14 28/V14 20 1 A : 7 = QR 7 055 21//21 3 8 6 TRUE or FALSE: QQT equals the identity matrix.

Reduce the matrix -1 -2 -4 8. A 3= -1 -8 2 1 -4 ed row-echelon form. 9:45 9 Type here to search 口令 NG 3/18/ UPEEF (凸)

-Make a 3 x 4 matrix with rank equal to 1. -Make a 3 x 4 matrix with nullity equal to 1.

Show that if A is square matrix that satisfies the equation 2 A² - A - I = O, then its inverse is A-¹ = 2 A-I. The equation 24² - A - I = O implies that ---Select--- ✓. It follows that ---Select--- ✓. Notice the last equation means that ---Select--- multiplied with A is the identity, which is what we wanted to prove.