I've done problems exactly like these, but these two keep giving me the wrong answer, and I'm not sure why. 1) if |x - 2| < delta then |1/x - 0.5| < 0.2 2) if |x - 4| < delta then |sqrt(x) - 2| < 0.4 In both I need to find delta.
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Originally Posted by CFem I've done problems exactly like these, but these two keep giving me the wrong answer, and I'm not sure why. 1) if |x - 2| < delta then |1/x - 0.5| < 0.2 2) if |x - 4| < delta then |sqrt(x) - 2| < 0.4 In both I need to find delta. For 2. Try multiplying by its conjugate. Notice that . So . So .
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