5. Evaluate the following limits : (a) $\lim_{x \to -4} \frac{x^2+5x+4}{x^2-5x+6}$ (b) $\lim_{x \to \infty} \frac{x^2-1}{x^2-3x-4}$ (8pts) 6. Find 2 numbers whose difference is 152 and whose product is a minimum. (Write out the solution) (10pts) 7. Find f if f"(x) = 2 + x³ + x? (8pts)
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(a) To evaluate the limit as x approaches infinity of (5x+4)/(x^2-1), we can divide both the numerator and denominator by x^2. This gives us (5/x + 4/x^2)/(1 - 1/x^2). As x approaches infinity, both 5/x and 4/x^2 approach 0, and 1/x^2 approaches 0. Therefore, the Show more…
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