Matemática p.a.
Ola lucas
Soma
Sn = a1*n + r*(n - 1)*n/2
S10 = 10*2 + r*9*10/2 = 200
20 + 45r = 200
45r = 180
r = 180/45
r = 4
pronto
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Ola lucas
Soma
Sn = a1*n + r*(n - 1)*n/2
S10 = 10*2 + r*9*10/2 = 200
20 + 45r = 200
45r = 180
r = 180/45
r = 4
pronto