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Unformatted text preview: x for the prescribed value x . 13. 1 3 2 ) ( 4 + + = x x x f at x = –1 14. 2 1 ) ( x x x x f +-= at x = 1 15. x x x x f + = ) ( at x = 1 16. An environmental study of a certain suburban community suggests that t years from now, the average level of carbon monoxide in the air will be 4 . 3 1 . 05 . ) ( 2 + + = t t t Q parts per million (ppm). (i) At what rate will the carbon monoxide level be changing with respect to time 1 year from now? (ii) By how much will the carbon monoxide level change this year? (iii) By how much will the carbon monoxide level change over the next 2 years?...
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- Spring '97