7) =-1/2* ln(3 - 2x)|₋₁¹ = -1/2*ln(3 -2*1) -(-1/2*ln(3 -2*(-1)) = -1/2*ln1 + 1/2ln5 =0,5 ln5
8) = - 6Cosx/6+1/5Sin5x)| от 0 до 2π =
= -6*Сos2π/3 + 1/5Sin10π - (-6Cos0 + 1/5Sin0)= 3 +1/*0 + 6 -1/5*0 = 9
9) = 1/3*Cos(π/3 -3x)| в пределах от 0 до 2π =
= 1/3*Сos(π/3 -3*2π) - 1/3*Cos(π/3 -0)= 1/3Cosπ/3 -1/3Cosπ/3 = 0