12. Find the limit as x approaches positive infinity and negative infinity for the following function: Homework Section 1.5 a. f (x) = x3 x5-3x+2 b. g(x) = x2-50x-3 6x2+x-45 c. h(x) _ Sx*-3x 2x2-5 13. A business manager determines that t months after production begins on a new product, the number of units produced will be P thousand, where P(t) - (4)2 . What happens to production in the long run