Mathematics
Senior High
Solved
至急!
印をつけている所の変形が意味が分からないので教えてください<(_ _)>
為(3K3K)
n
H+
36の+I(2n+1)+3knn-))
ナ(2h+1)+ )
n)+3
n(n2n-4)
ncn+(n+2)
=n+ 3n°+2n.
L
I1
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