Binomial expansions? (1 Viewer)

[Sindivyn]

Let's say you have a term ( n n-r)x^n-r * y^r, should you right it down as (n r) x^n-r * y^r? Or would markers recognise them as being the same (I always right it as the first term, guidelines are always saying it's the second).

 

[Sanjeet]

Let's say you have a term ( n n-r)x^n-r * y^r, should you right it down as (n r) x^n-r * y^r? Or would markers recognise them as being the same (I always right it as the first term, guidelines are always saying it's the second).

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[Shadowdude]

Let's say you have a term ( n n-r)x^n-r * y^r, should you right it down as (n r) x^n-r * y^r? Or would markers recognise them as being the same (I always right it as the first term, guidelines are always saying it's the second).

So you're asking if

C(n, n-r) = C(n, r)

Well... yeah. That's right.