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153Ch4and9evenanswers

153Ch4and9evenanswers - Section 4.1 2 a b Section 9.1 2-2...

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Section 4.1 2. 20. f(x) > 0 if x < -4 or x > 1 f(x) < 0 if -4 < x < 0 or 0 < x < 1 Section 4.6 8. k = 2500 3 12. k = 8 5 14. (a) kx F = (b) 3 40 = k (c) 20 lb. 16. a. I = k d 2 b. k = 2.5 x 10 9 c. 89.7 candlepower 24. a. V = k nT P = knT P b. V is doubled. Section 9.1 2. (-2, 5), (1,2) 4. No real solutions, y = 1 ± i 2 18. No real solutions, x = 6 5 ± 2 5 i 20. 1 3 ,6 , 2, 1 () 42.
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