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Karoline98
@Karoline98
October 2020
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Determine x a fim de que a sequência (-6-x, x+2, 4x) seja uma PA. Qual é a razão dessa PA.
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3478elc
Verified answer
(-6-x, x+2, 4x)
x + 2 - (-6-x) = 4x - (x+2)
x + 2 + 6 - x = 4x - x - 2
x + 2 + 6 - x = 4x - x - 2
2 + 6 + 2 = 3x
10 = 3x
x = 10/3
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Verified answer
(-6-x, x+2, 4x)
x + 2 - (-6-x) = 4x - (x+2)
x + 2 + 6 - x = 4x - x - 2
x + 2 + 6 - x = 4x - x - 2
2 + 6 + 2 = 3x
10 = 3x
x = 10/3