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4+8+12+... + 4n=2n(n+1)

4+8+12+... + 4n=2n(n+1)
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3 votes
4+8+12+... + 4n=2n(n+1)

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User Mazatec
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7.9k points

1 Answer

5 votes
4 + 8 + 12 + 4n = 2n(n + 1)
24 + 4n = 2n(n) + 2n(1)
24 + 4n = 2n² + 2n
-2n -2n
24 = 2n²
24 = 2n²
 2 2
12 = n²
√12 = n
√4 × 3 = n
√4 √3 = n
2 √3 = n
answered
User Duly Kinsky
by
8.3k points
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