Question

q(t)=0,4^2+1,2t, t=4 найти силу тока

Answer 1

Сила тока I


$I= frac{dQ}{dt} =Q' \ \ Q(t)=0,4t^2+1,2t \ \ I=Q'(t)=0.8t+1.2 \ \ I(4)=0.8*4+1.2=4.4 \ \ OTBET: 4.4$