9. Use the graph of f(x) a. -2 < x < 2 C. x + 2 a. 314 = b. 10. Determine the amplitude of the sinusoidal function y = 0.75 cos; x − 0.5 EIN 5 x²+1 2 5 to solve the inequality. < 1. x²+1 b. x < -2, x > 2 d. No solution 1 c./ 2 d. 0.5 -4 -2 0 -2 f(x) 2 5 x+1 4 x

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