InterviewSolution
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InterviewSolution
| 1. |
The expression ^nC_{r-3}+3^nC_{r-2} +3^nC_{r-1}+^nC_r simplifies to {(1)}^{n+3}C_r {(2)}^{n+3}C_{r-1} {(3)}^{n+3}C_{r+1} {(4)}^{n+3}C_{r-3} |
| Answer» The expression ^nC_{r-3}+3^nC_{r-2} +3^nC_{r-1}+^nC_r simplifies to {(1)}^{n+3}C_r {(2)}^{n+3}C_{r-1} {(3)}^{n+3}C_{r+1} {(4)}^{n+3}C_{r-3} | |