Question: 18. a. Let A = {a, b,c,d,e} and B = {0, 1,2,3,4,5,6}. Find the number of one-to-one functions / : A - B such that

18. a. Let A = {a, b,c,d,e} and B = {0, 1,2,3,4,5,6}. Find the number of one-to-one functions / : A - B such that fa) = 0 or A(b) = 6. Hint: Use inclusion-exclusion. b. Find the coefficient of xay* in the expansion of (3x - 2p)&quot

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