Which statement about the simplified binomial expansion of open paren A minus b close paren to the n th power , where n is a positive integer, is true?

In the binomial expansion of (A − b)^n, the first term is A^n. Since n is a positive integer, this term has no negative sign in front of it, so the first term is positive. The remaining terms alternate signs, so it is not true that all terms are negative.

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