What is the value of 2(2 \times 1)+3(3 \times 2 \times 1)+4(4 \times 3 \times 2 \times 1)+ 5(5 \times 4 \times 3 \times 2 \times 1)+. . . . . . . . . . . . . . . . . .+ 9(9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1)+2 ? [NDA-I 2022]

NDA Math Binomial Theorem

Question : 7 of 50

Marks: +1, -0

What is the value of

2(2×1)+3(3×2×1)+4(4×3×2×1)+
5(5×4×3×2×1)+..................+
9(9×8×7×6×5×4×3×2×1)+2?

[NDA-I 2022]

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