Question

пожалуйств помогите срочно номер 39.5

Answer 1

$1) : frac{5a + {b}^{5} }{8b} - frac{5a - 7 {b}^{5} }{8b} = frac{5a + {b}^{5} - 5a + 7 {b}^{5} }{8b} = frac{8 {b}^{5} }{8b} = {b}^{4} \ \ 2) : frac{2x - 3y}{4xy} + frac{11y - 2x}{4xy} = frac{2x - 3y + 11y - 2x}{4xy} = frac{8y}{4xy} = frac{2}{x}$

$3) : frac{3x - {y}^{4} }{4 {y}^{5} } - frac{ {y}^{4} + 3x}{4 {y}^{5} } = frac{3x - {y}^{4} - {y}^{4} - 3x }{4 {y}^{5} } = frac{ - 2 {y}^{4} }{4 {y}^{5} } = - frac{1}{2y} \ \ 4) : frac{a - 2}{7a} + frac{2a + 5}{7a} - frac{3 - a}{7a} = frac{a - 2 + 2a + 5 - 3 + a}{7a} = frac{4a}{7a} = frac{4}{7}$

$5) : frac{7y - 5}{11y} - frac{10y - 9}{11y} + frac{10 - 5y}{11y} = frac{7y - 5 - 10y + 9 + 10 - 5y}{11y} = frac{ 14- 8y}{11y}$

$6) : frac{21a + 2b}{6a} + frac{21a - 3b}{6a} - frac{ 36a - b }{6a} = frac{21a + 2b + 21a - 3b - 36a + b}{6a} = frac{6a}{6a} = 1$