JEE Main 202229 Jul, Evening shiftMathematicsMediumBinomial Theorem and Its Simple Applications131× since 2002∑r=120(r2+1)(r!)\sum\limits_{r=1}^{20}\left(r^{2}+1\right)(r !)r=1∑20(r2+1)(r!) is equal toAOption A. 22!−21!22 !-21 !22!−21!BOption B. 22!−2(21!)22 !-2(21 !)22!−2(21!)COption C. 21!−2(20!)21 !-2(20 !)21!−2(20!)DOption D. 21!−2021 !-2021!−20 !CheckSkip · show solution
