Răspuns:
Explicație pas cu pas:
1)
=(³⁾3-1/3)*(3/8)²
= (9/3-1/3)*(3/8)²
= 8/3 *(3/8)²
= se simplifica 3 cu 3 ....8 cu 8
= 3/8 (d)
-
2)
=(³⁾1/2+²⁾1/3-1/6):4+7/9
= (3/6+2/6-1/6):4+7/9
= (5/6-1/6):4+7/9
= 4/6 :4 +7/9
= 4/6*1/4+7/9
= se simplifica 4 cu 4
= ⁶⁾1/6+⁴⁾7/9
= 6/36+28/36
= 34⁽²/36⁽²
=17/18 (a)
-
3)
1¹/₄=(1*4+1)/4=5/4
= (5/4)⁴:(5/4)³-2/3
= (5/4)⁴⁻³ -2/3
= (5/4)¹-2/3
= ³⁾5/4-⁴⁾2/3
= 15/12-8/12
= 7/12 (c)
