Răspuns:
Explicație pas cu pas:
a/b = 13/12 ; (4a+b)/(4a-3b) = ?
a/b = 13/12 => a = 13b/12
4a+b = 4·13b/12 + b = 13b/3 + ³⁾b = (13b+3b)/3 = 16b/3
4a-3b = 4·13b/12 - 3b = 13b/3 - ³⁾3b = (13b-9b)/3 = 4b/3
(4a+b)/(4a-3b) = (16b/3) : (4b/3) = (16b/3)· (3/4b) =
= (16b·3)/(3·4b) = 48b / 12b = 4 = 2²
(4a+b)/(4a-3b) = 4 = 2²
#copaceibrainly
