Ребят,помогите пожалуйста,15 вариант

1) lim(3x^2+5x-4) = 3*3^2 +5*3-4 = 38
x->3
2)
$\frac{5 \times {2}^{2} - 2 \times 2 + 9}{4 \times {2}^{2} - 8 } = \frac{25}{8}$
3) =
$( \frac{0}{0} ) = lim \frac{27 {x}^{2} + 2x}{4 {x}^{3} + 9 {x}^{2} - 4x } = ( \frac{0}{0} ) = lim \frac{54x + 2}{12 {x}^{2} + 18x - 4} = - \frac{1}{2}$

4)
$\frac{ - 2 \times {0.5}^{2} + 7 \times 0.5 - 3 }{2 \times 0.5 - 1} = ( \frac{0}{0} ) = lim \frac{ - 4x + 7}{2} = \frac{ - 4 \times 0.5 + 7}{2} = \frac{5}{2} .$
5)
$\frac{20 - 20 \times 2 + 5 \times 2 ^{2} }{ {2}^{3} - 8 } = ( \frac{0}{0} ) = lim \frac{ - 20 + 10x}{3 {x}^{2} } = \frac{ - 20 + 10 \times 2}{3 \times 4} = 0$
6)
$= ( \frac{0}{0} ) = lim \frac{ \frac{1}{2 \times (2x + 1)} \times 2}{1} = lim\frac{1}{2x + 1} = \frac{1}{7}$
7) =
$\frac{0}{0} = lim\frac{cos13x \times 13}{1} = 13$