Author Topic: Binomial questions (Read 813 times)

astarmathsandphysics · « **on:** September 25, 2009, 06:14:15 pm »

ⁿC₂/ⁿC₃= $\frac {n!}{2!(n-2)!}$ / $\frac {n!}{3!(n-3)!}$

= $\frac {3!(n-3)!}{2!(n-2)!}=\frac {3*2!}{2!}* \frac {(n-3)!}{(n-2)!} =3* \frac {(n-3)!}{(n-2)(n-3)!}=3/(n-2)$

Ghost Of Highbury · « **Reply #1 on:** September 25, 2009, 06:18:02 pm »

awesome..thanks a lot sir...!!!
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astarmathsandphysics · « **Reply #2 on:** September 26, 2009, 08:05:58 am »

See also

http://www.astarmathsandphysics.com/a_level_maths_notes/C2/a_level_maths_notes_c2_binomial_expansion.html

Ghost Of Highbury · « **Reply #3 on:** September 26, 2009, 08:18:44 am »

thanks

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Author Topic: Binomial questions (Read 813 times)

astarmathsandphysics

Binomial questions

Ghost Of Highbury

Re: Binomial questions

astarmathsandphysics

Re: Binomial questions

Ghost Of Highbury

Re: Binomial questions