Question

Qual o valor da expressão a - b/ab para a = 1/3 e b = 2/5?

Answer 1

a = 1/3

b = 2/5

a - b / a.b

1/3 - 2/5 / 1/3 x 2/5

5 - 6/15 / 2/15

-1/15 / 2/15

-1 / 15 x 15/2

-15 / 30 = -1/2

Answer 2

$\LARGE\sf \dfrac{a-b}{ab}$⠀→ Para a = 1/3, e b = 2/5

$\sf \dfrac{\left(\dfrac{1}{3}\right) - \left(\dfrac{2}{5}\right)}{\left(\dfrac{1}{3}\right) \times \left(\dfrac{2}{5}\right)}$

$\sf \dfrac{\left(\dfrac{5 - 6}{3 \times 5}\right)}{\left(\dfrac{2}{15}\right)}$

$\sf \dfrac{\left(\dfrac{-1}{15}\right)}{\left(\dfrac{2}{15}\right)}$

$\sf -\dfrac{1}{15} \times \dfrac{15}{2}$

$\sf -\dfrac{15}{30}=\boxed{\mathsf{~-\dfrac{1}{2}}~}$

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❑ ⠀O valor final é -1/2.

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❑ ⠀Aprenda mais em

• brainly.com.br/tarefa/30149872

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Espero Ter Ajudado !!