Question

Помогите с заданием!!!!! на фотографии

Answer 1

$S=F(4)-F(1)= \\ = ( \frac{ - 3}{ {4}^{2} } + 2 \times 4 - 3) - (\frac{ - 3}{ {1}^{2} } + 2 \times 1 - 3) = \\ = - \frac{3}{16} + 8 - 3 +3 + 2 - 3 = \\ = - \frac{3}{16} + 7 = 6 \frac{13}{16}$