15. Given A (X) define the characteristic function A : X {0, 1} by Suppose that A and B are subsets of X. (i) Prove that the fun
ction x A(x) B(x) (multiplication of integers) is the characteristic function of the intersection A B. (ii) Find the subset C whose characteristic function is given by
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Answer:
3 cups
Step-by-step explanation:
we can solve this by setting up ratios
cross multiply:
solve for x