MathematicsMedium98×since 2002Q4808If for some m,n;6Cm+2(6Cm+1)+6Cm+2>8C3m, n ;{ }^6 C_m+2\left({ }^6 C_{m+1}\right)+{ }^6 C_{m+2}>{ }^8 C_3m,n;6Cm+2(6Cm+1)+6Cm+2>8C3 and n−1P3:nP4=1:8{ }^{n-1} P_3:{ }^n P_4=1: 8n−1P3:nP4=1:8, then nPm+1+n+1Cm{ }^n P_{m+1}+{ }^{\mathrm{n}+1} C_mnPm+1+n+1Cm is equal toA380B376C372D384Check answerSkip