Answer to Question #199710 in Algebra for Moe

Question #199710

Note vector notation: (vector 1;vector 2)


Select the correct answer:


k(k-1) • • • (k-r)(m+1)m• • • 3• 2

_________________________ =

p(p-1)• • • (p-m)(r+1)r• • • 3• 2• 


a) (k;r) / (p+1 ; m)


b) (p;r) / (k+1 ; m)


c) (k;r) / (p ; m + 1)


d) (k;r) / (m+1 ; p)


e) (k; r +1) / (p ; m)


f) (k; r + 1) / (p ; m+1)



1
Expert's answer
2021-05-28T10:19:41-0400

"\\frac{k\\left(k-1\\right)\\cdot \\left(k-r\\right)\\left(m+1\\right)m}{p\\left(p-1\\right)\\cdot \\left(p-m\\right)\\left(r+1\\right)r}"


"=\\frac{km\\left(k-1\\right)\\left(-r+k\\right)\\left(m+1\\right)}{r^2p^3+rp^3-r^2mp^2-rmp^2-r^2p^2-rp^2+r^2mp+rmp}"


"=\\frac{k^3m^2+k^3m-k^2rm^2-k^2rm-k^2m^2-k^2m+krm^2+krm}{r^2p^3+rp^3-r^2mp^2-rmp^2-r^2p^2-rp^2+r^2mp+rmp}"


From the above expression, the answer is d) (k;r) / (m+1 ; p)


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