Question

15!/2!13!
simplify answer

Answer 1

Could you rephrase it without the !..

Answer 2

It's hard to tell if that is 15/213
or 15/2
or 15i/213i

Answer 3

Really big hint: \(\dfrac{15!}{13!} = 15*14\)

Answer 4

thats the way it is !

Answer 5

o.o

Answer 6

its called a factorial, and we use the property here that
\(\large n! =n(n-1)!\)

Answer 7

oh, well, i haven't learned that yet, my bad.

Answer 8

yes it is

Answer 9

\[\frac{ 15! }{ 2!13! }=\frac{ 15\cdot14\cdot\cancel{13!} }{ 2!\cancel{13!} }\]

Answer 10

so, \(\large 15! = 15\times 14! \\ \large 14! = 14 \times 13! \\ 2! =2*1\)

Answer 11

can u simplify?

Answer 12

after 13! gets cancelled,
you are left with just 15*14/2 = ... ?

Answer 13

?

Answer 14

which step did u not understand ?

Answer 15

so is15*14/2 the aswer?

Answer 16

calculate it, notice that 14/2 = 7
so whats 15*7 =...?

Answer 17

105

Answer 18

yes, thats the answer.

Answer 19

thanks a lot