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Mathematics 1990 Jamb Past QuestionsQuestion 11 :Simplify 3 log69 + log612 + log664 - log672 A. 5 B. 7776 C. Log631 D. (7776)6 Question 12 :Simplify (\(\frac{1}{x^{-1}} + \frac{1}{y^{-1}}\))-1 A. \(\frac{x}{y}\) B. Xy C. \(\frac{x}{y}\) D. (xy)-1 Question 13 :If a = 2, b = -2 and c = -\(\frac{1}{2}\), evaluate (ab2 - bc2)(a2c - abc) A. 2 B. -28 C. -30 D. -34 Question 14 :If f(x - 4) = x2 + 2x + 3, Find, f(2) A. 6 B. 11 C. 27 D. 51 Question 15 :Factorize 9(x + y)2 - 4(x - y)2 A. (x + y)(5x + y) B. (x + y)2 C. (x + 5y)(5x + y) D. 5(x + y)2 |
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