Undetermined Coefficients (Part 2)

Algebra

1⋅2⋅3+2⋅3⋅4+3⋅4⋅5+⋯+98⋅99⋅100= ? 1\cdot 2\cdot 3+2\cdot 3\cdot 4+3\cdot 4\cdot 5+\dots +98\cdot 99\cdot 100 = \, ?

You may want to read the wiki Method of Undetermined Coefficients.
Arulx Z by Arulx Z
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