Question

Please help will grant u the brainliest ...

Answer 1

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