If in the expansion of (1+x)20, the coefficients of rth and (r+4)th terms are equal, then the value of r is equal to:
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If the coefficients of rth term and (r+4)th term are equal in the expansion of (1+x)20, then the value of r will be
If the expansion of (1+x)20, then coefficients of rth and (r+4)th terms are equal, then r is equal to
If in the expansion of (1+x)n, the coefficients of rthand (r+2)th terms be equal, then r is equal to :