MathematicsMedium64×since 2002Q2941The sum of the coefficients of three consecutive terms in the binomial expansion of (1+x)n+2(1+\mathrm{x})^{\mathrm{n}+2}(1+x)n+2, which are in the ratio 1:3:51: 3: 51:3:5, is equal to :A63B92C25D41Check answerSkip