Question

punctul B va rog frumos

Answer 1

Răspuns:

Explicație pas cu pas:

1/3 + 1/5 = 5/15 + 3/15 = 8/15

a = 8/15 : 1/2 = 8/15*2/1 = 16/15

___________

1/3 - 1/5 = 5/15 - 3/15 = 2/15

b = 1/2*2/15 = 1/15

___________

a/b = 16/15 : 1/15 = 16/15*15/1 = 16

a = 16b

Answer 2

$\bf a) \ \ \it a=\Big(\dfrac{^{5)}1}{\ 3}+\dfrac{^{3)}1}{\ \ 5}\Big):\dfrac{1}{2}=\dfrac{8}{15}\cdot\dfrac{2}{1}=\dfrac{16}{15}\\ \\ \\ \bf b)\ \ \it b=\dfrac{1}{2}\cdot\Big(\dfrac{^{5)}1}{\ \ 3}-\dfrac{^{3)}1}{\ \ 5}\Big)=\dfrac{1}{\not2}\cdot\dfrac{\not2}{15}=\dfrac{1}{15}\\ \\ \\ a=\dfrac{16}{15}=16\cdot\dfrac{1}{15}=16\cdot b \Rightarrow a>b\ de\ 16\ ori$