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Power Serieseasy
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If ∑n=0∞anxn=∑n=0∞bnxn\sum_{n=0}^{\infty} a_n x^n = \sum_{n=0}^{\infty} b_n x^n∑n=0∞​an​xn=∑n=0∞​bn​xn for all xxx in an open interval centered at 0, which statement MUST be true?