Math 1A: Calculus Worksheets

(c) Using absolute value notation. (d) Using interval notation. 4. Let f(x) be x2. (a) Find all the positive numbers x such that f(x) is within 1 of 9. (“Within” means the same thing it did in Problems 1 and 2, but here it refers to numbers on the y-axis.) Give your answer: i. On a graph of y = x2. ii. Using inequalities. iii. Using ... ................
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