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Let f(x) = x^2 for x < 1 and f(x) = 2x - 1 for x >= 1. At x = 1, f is

Adiscontinuous
Bunbounded there
Cundefined there
Dcontinuous
Answer & Solution
Correct answer: D. continuous
Both sides give 1 at x = 1 and f(1) = 1, so the left limit, right limit and value agree.
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