Question

[ 7/5 impartit 14/15 + 3/2 impartit ( 9/4 - 1 1/2) ] · 2/7 Va rog mult de tot!!

Answer 1

Răspuns:

Explicație pas cu pas:

[ ( 7 / 5 ) : ( 14 / 15 ) + ( 3 / 2 ) : ( 9 / 4 - 3 / 2 ) ] × 2 / 7 =  1

= [ ( 7 / 5 ) × ( 15 / 14 ) + ( 3 / 2 ) : ( 9 / 4 - 6 / 4 ) ] × 2 / 7 =

= [ 3 / 2 + ( 3 / 2 ) × 4 / 3 ) ] × 2 / 7 =

= ( 3 / 2 + 4 / 2 ) × 2 / 7 =

= ( 7 / 2 ) × ( 2 / 7 ) =

= 1

Answer 2

$\it \Big [\dfrac{7}{5}:\dfrac{14}{15}+\dfrac{3}{2}:\Big(\dfrac{9}{4}-1 \dfrac{1}{2}\Big )\Big]\cdot\dfrac{2}{7}= \Big [\dfrac{7}{\not5}\cdot\dfrac{\not15^3}{14}+\dfrac{3}{2}:\Big(\dfrac{9}{4}- \dfrac{^{2)}3}{\ \ 2}\Big )\Big]\cdot\dfrac{2}{7}=\\ \\ \\ = \Big [\dfrac{\ 21^{(7}}{14}+\dfrac{3}{2}:\Big(\dfrac{9}{4}- \dfrac{6}{4}\Big )\Big]\cdot\dfrac{2}{7}=\Big(\dfrac{3}{2}+\dfrac{\not3}{2}\cdot\dfrac{4}{\not3}\Big)\cdot\dfrac{2}{7} =\dfrac{\not7}{\not2}\cdot\dfrac{\not2}{\not7}=1$