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AcrisiaSouza
@AcrisiaSouza
October 2019
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1- Escreva uma PA de 5 termos onde:
a) a1= 6 e r= -7
b) a1= -14 e r= 4
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JacksonCauando
A) a₁ = 6; r = -7
aₓ = aₓ₋₁ + r
a₂ = a₁ + r ⇔ a₂ = 6 - 7 = -1
a₃ = a₂ + r ⇔ a₃ = -1 - 7 = -8
a₄ = a₃ + r ⇔ a₄ = -8 - 7 = -15
a₅ = a₄ + r ⇔ a₅ = -15 - 7 = -22
PA (6, -1, -8, -15, -22)
B)a₁ = -14; r = 4
a₂ = a₁ + r ⇔ a₂ = -14 + 4 = -10
a₃ = a₂ + r ⇔ a₃ = -10 + 4 = -6
a₄ = a₃ + r ⇔ a₄ = -6 + 4 = -2
a₅ = a₄ + r ⇔ a₅ = -2 + 4 = 2
PA (-14, -10, -6, -2, 2)
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aₓ = aₓ₋₁ + r
a₂ = a₁ + r ⇔ a₂ = 6 - 7 = -1
a₃ = a₂ + r ⇔ a₃ = -1 - 7 = -8
a₄ = a₃ + r ⇔ a₄ = -8 - 7 = -15
a₅ = a₄ + r ⇔ a₅ = -15 - 7 = -22
PA (6, -1, -8, -15, -22)
B)a₁ = -14; r = 4
a₂ = a₁ + r ⇔ a₂ = -14 + 4 = -10
a₃ = a₂ + r ⇔ a₃ = -10 + 4 = -6
a₄ = a₃ + r ⇔ a₄ = -6 + 4 = -2
a₅ = a₄ + r ⇔ a₅ = -2 + 4 = 2
PA (-14, -10, -6, -2, 2)