When you added k^3 + (k+1)^3 + (k+2)^3 I got 3x^3 + 9x^2 + 15x + 9. I dont know how you got 3k^3 + 9k^2 + +9k + 9. I double checked it with symbolab too, so I really have no clue how you got that answer.
When you added k^3 + (k+1)^3 + (k+2)^3 I got 3x^3 + 9x^2 + 15x + 9. I dont know how you got 3k^3 + 9k^2 + +9k + 9. I double checked it with symbolab too, so I really have no clue how you got that answer.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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When you added k^3 + (k+1)^3 + (k+2)^3 I got 3x^3 + 9x^2 + 15x + 9. I dont know how you got 3k^3 + 9k^2 + +9k + 9. I double checked it with symbolab too, so I really have no clue how you got that answer.
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