If the coefficients of the (2r − 4)-th and (r − 2)-th terms in the expansion of (1 + x)18 are equal, then r is: (Here, the k-th term means the term containing xk, so its coefficient is C(18, k).)

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If the coefficients of the (2r − 4)-th and (r − 2)-th t... | Mathematics MCQ #5 | Examora | Examora