C-10-Q045mediumsingle_mcqThe general term Tr+1T_{r+1}Tr+1 in the expansion of (1+y)n(1+y)^n(1+y)n is —anCryr−1^nC_r y^{r-1}nCryr−1bnCryr^nC_r y^rnCryrcnCr+1yr^nC_{r+1} y^rnCr+1yrdnCryn−r^nC_r y^{n-r}nCryn−r