2x2-3x+7 7. Let f(x) = Find f(3). 5x2-2x 8. Suppose f (x) = Vx – 3 and g(x) = x² +5. Which o e following is a formula for (fo g)(x)? 9. Suppose f(x) = x² + 3 and g(x) = x - 2. Which of the following is a formula for (f - g)(x)? 10. Using the figure on the right and U = {a, b, c, d, e, f, g,h} being the universal set, find the elements of the set (X n Y)UZ. a e g Z. 11. consider the following sets: U = {-5,-4,–3,-2,–1,0,1,2,3,4,5}, A = {x: x² = 25}, B = {-5,0,1,2,3,4, 5} C = {x:x² – 5x + 6 = 0}. a. What is A n B? b. Which is equal to B\C? c. Which set is equal to (B\A)°? d. What is the cardinality of a countably infinite set? SAPIEN

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