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12. Calculati:
a) (5 +
2
b) 4/7 +
/10
+
10
| -
√√35
(12 - 8 6 - 9 /8-/20 /30 - 12
c)
+
+
+
√√24
√18
√40
√60
√2-√3 √3-√4 √4-√5 √5-√6 √6-√√7 √7-√√8
d)
√6 12
√20
√30
√42
√56
√5 √√√2
2
+
√√√√5
+
√8
(s 20
(125
+
4/10 -5/2 ;
1
(175
-25√35-7√5;
+