Find the Sum Using the Formulas for the Sums of Powers

question 273

Multiple Choice

Find the sum using the formulas for the sums of powers of integers. $\sum _ { n = 1 } ^ { 5 } \left( n ^ { 2 } - n \right)$

• A)40
• B)330
• C)225
• D)15
• E)55

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Learned Helplessness

A condition in which a person suffers from a sense of powerlessness, arising from a traumatic event or persistent failure to succeed, leading to decreased motivation and learning.

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