Question

va rog repedeeeeeee ​

Answer 1

Răspuns:

Ra)1/4;b)1

Explicație pas cu pas:

a)[(2/3)²-1/12]:1 4/9-(1/2)³=(⁴4/9-³1/12):13/9-1/8=

(16-3)/36×9/13-1/8=13/36×9/13-1/8=13/13×9/36=1/4

b)[(2 1/3:3 1/2+5/9)-5/6]:2 1/3+5/6=

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

[(6+5)/9-5/6]:7/3+5/6=(²11/9-³5/6)×3/7+5/6=(22-15)/18×3/7+5/6=

7/18×3/7+5/6=7/7×3/18+5/6=1/6+5/6=6/6=1