Q(t) = S I(t) dt = S (3t^2 + 4) dt = t^3 + 4t + Qo
Q(1) = 11 per cui
1 + 4 + Qo = 11 => Qo = 6
Q(t) = t^4 + 4t + 6
Q(2) = 2^3 + 4*2 + 6 = 22 C
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