Question

Please help I don't get these.

Answer 1

The pling "!" means factorial - have you heard of this term?

Answer 2

Nope

Answer 3

it means multiply the number by all numbers less than itself until you get to 1.

e.q. 4! = 4 x 3 x 2 x 1 = 24

Answer 4

so 10! = 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1

which can also be written as:

10! = 10 x 9 x 8 x 7 x 6!

Answer 5

so I multiply?

Answer 6

yes - but note that the 6! term can be cancelled out from numerator and denominator

Answer 7

\[\frac{10!}{6!}=\frac{10\times9\times8\times7\times\cancel{6!}}{\cancel{6!}}=10\times9\times8\times7\]

Answer 8

Oh Thank you makes more sense now! :)

Answer 9

great! :)

Answer 10

Can you help me with one more...it has three of those..

Answer 11

sure