Question

1. Evaluate 5!, 71 and prove that 5! +7!≠12 !​

Answer 1

Answer:

5!=5×4×3×2×1=120

7!=7×6×5×4×3×2×1=5040

therefore,5!+7!=120+5040=5160. ...........(i)

12!=12×11×10×9×8×7×6×5×4×3×2×1=479001600...........(ii)

from (i) &(ii) we can say that

5!+7! is not equals to 12!

hence, proved