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Suppose that A ⊆ B ⊆ V .
(a) Prove that span(A) ⊆ span(B).
(b) Prove that if B is linearly independent then A is linearly independent.? What is 5/6+5/7*1/5? Find X so that the between points (6,-1) and (X,9) is 12.? If the function f(x)=-x^4+2x^2-1 odd, even, or neither? Why? What is the chemical formula for road salt?