$a)$

$x = 1$

$L = 2 \cdot (1 - 3) + 5 =$ $2 \cdot (- 2) + 5 =$ $- 4 + 5 = 1$

$P = \frac{1 - 1}{3} + 1 = 0 + 1 = 1$

$L = P$

$x = 3$

$L = 2 \cdot (3 - 3) + 5 =$ $2 \cdot 0 + 5 = 0 + 5 = 5$

$P = \frac{3 - 1}{3} + 1 = \frac{2}{3} + 1 = 1 \frac{2}{3}$

$L \neq = P$

$x = 5$

$L = 2 \cdot (5 - 3) + 5 =$ $2 \cdot 2 + 5 = 4 + 5 = 9$

$P = \frac{5 - 1}{3} + 1 = \frac{4}{3} + 1 = 1 \frac{1}{3} + 1 = 2 \frac{1}{3}$

$L \neq = P$

$b)$

$x = 1$

$L = - 3, 5 \cdot 1 + 1, 5 =$ $- 3, 5 + 1, 5 = - 2$

$P = 4 [2 - 10 (1 - 1)] + 2 =$ $4 [2 - 10 \cdot 0] + 2 =$ $4 \cdot 2 + 2 = 10$

$L \neq = P$

$x = 3$

$L = - 3, 5 \cdot 3 + 1, 5 =$ $- 10, 5 + 1, 5 = - 9$

$P = 4 [2 - 10 (3 - 1)] + 2 =$ $4 \cdot [2 - 10 \cdot 2] + 2 =$ $4 \cdot [2 - 20] + 2 =$

$= 4 \cdot (- 18) + 2$

$L \neq = P$

$x = 5$

$L = - 3, 5 \cdot 5 + 1, 5 =$ $- 17, 5 + 1, 5 =$ $- 16$

$P = 4 [2 - 10 (5 - 1)] + 2 =$ $4 [2 - 10 \cdot 4] + 2 =$ $4 \cdot (2 - 40) + 2 =$

$= 4 \cdot (- 38) + 2$

$L \neq = P$

$c)$

$x = 1$

$L = 1 - \frac{1 - 2 \cdot 1}{3} =$ $1 - \frac{1 - 2}{3} =$ $1 - \frac{- 1}{3} =$ $1 + \frac{1}{3} = 1 \frac{1}{3}$

$P = 1 - 1 = 0$

$L \neq = P$

$x = 3$

$L = 1 - \frac{1 - 2 \cdot 3}{3} =$ $1 - \frac{1 - 6}{3} =$ $1 - \frac{- 5}{3} =$ $1 + \frac{5}{3} = 1 + 1 \frac{2}{3} = 2 \frac{2}{3}$

$P = 3 - 1 = 2$

$L \neq = P$

$x = 5$

$L = 1 - \frac{1 - 2 \cdot 5}{3} =$ $1 - \frac{1 - 10}{3} =$ $1 - \frac{- 9}{3} =$ $1 + \frac{9}{3} = 1 + 3 = 4$

$P = 5 - 1 = 4$

$L = P$

$d)$

$x = 1$

$L = \frac{8 - 2 \cdot 1}{4} + 2 \cdot 1 =$ $\frac{8 - 2}{4} + 2 =$ $\frac{6}{4} + 2 = \frac{3}{2} + 2 = 1 \frac{1}{2} + 2 = 3 \frac{1}{2}$

$P = 1, 5 \cdot 1 + 2 = 1, 5 + 2 = 3, 5$

$L = P$

$x = 3$

$L = \frac{8 - 2 \cdot 3}{4} + 2 \cdot 3 =$ $\frac{8 - 6}{4} + 6 =$ $\frac{2}{4} + 6 = 6 \frac{1}{2}$

$P = 1, 5 \cdot 3 + 2 =$ $4, 5 + 2 = 6, 5$

$L = P$

$x = 5$

$L = \frac{8 - 2 \cdot 5}{4} + 2 \cdot 5 =$ $\frac{8 - 10}{4} + 10 =$ $- \frac{2}{4} + 10 =$ $9 \frac{1}{2}$

$P = 1, 5 \cdot 5 + 2 =$ $7, 5 + 2 = 9, 5$

$L = P$

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