imagoatenvy imagoatenvy

21-02-2020
Mathematics

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jimrgrant1 jimrgrant1

21-02-2020

Answer:

44

Step-by-step explanation:

Substitute k = 1, 2, 3, 4 into the expression and sum the terms.

2(1)² - 4 + 2(2)² - 4 + 2(3)² - 4 + 2(4)² - 4

= 2 - 4 + 8 - 4 + 18 - 4 + 32 - 4

= - 2 + 4 + 14 + 28

= 44

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