Question

ВЫЧИСЛИТЕ СРОЧНО!!!!!!!!!!​

Answer 1

$1) \ 6!-5!=5!\cdot 6-5!=5!\cdot(6-1)=5!\cdot5=1\cdot2\cdot3\cdot4\cdot5\cdot5=\boxed{600}\\\\\\2) \ A_{4} ^{3} -C_{4} ^{2}=\dfrac{4!}{(4-3)!} -\dfrac{4!}{2!\cdot(4-2)!} =4!-\dfrac{4!}{2!\cdot2!} =\\\\\\=1\cdot2\cdot3\cdot4-\dfrac{1\cdot2\cdot3\cdot4}{1\cdot2\cdot1\cdot2} =24-6=\boxed{18}$