Question

alguien me ayuda con este problema​

Answer 1

Respuesta:

a. 1

Explicación paso a paso:

(5/9 - 3/7) / (1/4 x 7/5 ) + 281/441 ...mcm: 9 -7 = 63

[(35-27)/63]/(1/4 x 7/5 ) + 281/441  ...recordamos a/b x c/d = (axc)/(bxd)

(8/63)/[(1x7)/(4x5)]+ 281/441

(8/63)/ (7/20) + 281/441 ... recuerda (a/b)/(c/d) = axd/ bxc

[(8x20)/(63x7)] + 281/441

160/441 + 281/441 ... recordamos (a/b)+(c/b)= (a+c)/b

(160+281)/441

441/441 = 1