1.The sum 1×1!+2×2!+⋯+50×50!1 \times 1! + 2 \times 2! + \dots + 50 \times 50!1×1!+2×2!+⋯+50×50! equalsa.51!51!51!b.51!−151! - 151!−1c.51!+151! + 151!+1d.2×51!2 \times 51!2×51!Login to continueOnly logged in users canattempt or see the solution.
