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AcrisiaSouza
@AcrisiaSouza
October 2019
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Ache A1 e R, sendo a2+a4=18 e a3+a6=30
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TiagoEd
A2 + a4 = 18
a3 + a6 = 30
a1 + r + a1 + 3r = 18
a1 + 2r + a1 + 5r = 30
2a1 + 4r = 18 *(-1)
2a1 + 7r = 30
-2a1 - 4r = -18
2a1 + 7r = 30
3r = 12
r = 12/3
r = 4
2a1 + 7r = 30
2a1 + 7*4 = 30
2a1 + 28 = 30
2a1 = 30 - 28
2a1 = 2
a1 = 2/2
a1 = 1
2 votes
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Lista de comentários
a3 + a6 = 30
a1 + r + a1 + 3r = 18
a1 + 2r + a1 + 5r = 30
2a1 + 4r = 18 *(-1)
2a1 + 7r = 30
-2a1 - 4r = -18
2a1 + 7r = 30
3r = 12
r = 12/3
r = 4
2a1 + 7r = 30
2a1 + 7*4 = 30
2a1 + 28 = 30
2a1 = 30 - 28
2a1 = 2
a1 = 2/2
a1 = 1