Show that the following are bases of the space V indicated. (a) {(- 1, 1, 1), (1,
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(a) {(- 1, 1, 1), (1, - 1, 1), (1, 1, - 1)}; V = R3
(b) {1 + x, x + x2, x2 + x3, x3}; V = P3
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