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ASSIGNMENT 1
1. Given A = {1, 2, 5, 6}, B = {3, 4}, C = {2, 7, 9}, D = {8}. Find
2. A study was done to determine the efficacy of three different drugs - A, B, and C - in relieving headache pain. Over the period covered by the study, 50 subjects were given the chance to use all three drugs. The following results were obtained:
21 reported relief from drug A.
15 reported relief from both drugs B and C.
41 reported relief from at least one of the drugs.
(d) How many subjects got relief from A only?
3. (a) If $a^{\frac{1}{2}} - a^{- \frac{1}{2}} = 1$, evaluate a − a−1.
(b) Given (1+4i)u − 4w = − 1 + 2i. Find u and w if
(i) u and w are real numbers.
PLEASE HAND IN YOUR ASSIGNMENTS BY 5 APRIL 2018