1.If the coefficient of (2r+1)(2r+1)(2r+1)th term and (r+2)(r+2)(r+2)th term in the expansion of (1+x)43(1+x)^{43}(1+x)43 are equal, then rrr is equal toa.12b.14c.16d.18Login to continueOnly logged in users canattempt or see the solution.
