5.7
b) (2,5)-²·(0,2)-²·(2/3)-²=
c)(2/3)-⁴·(3/4)-⁴=
5.8
b)(2/7)-³:(3/7)-³·(0,25)-³=
c)2-⁵·3-⁵ 5-³·6-³
------- · ----------=
18-⁵ 10-³
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b) (2,5)-²·(0,2)-²·(2/3)-²=(25/10 * 2/10 * 2/3)-²=(1/3)-²=3²=9
c)(2/3)-⁴·(3/4)-⁴=(2/3 * 3/4)-⁴=(1/2)-⁴=2⁴=16
b)(2/7)-³:(3/7)-³·(0,25)-³=(2/7 : 3/7 * 25/100)-³=(2/7 * 7/3 *25/100)-³=(1/6)-³=6³=216
c)2-⁵·3-⁵ 5-³·6-³ 6-⁵ . 30-³
------- · ----------= ...... ...... = (6-⁵:18-⁵)*(30-³:10-³)=
18-⁵ 10-³ 18-⁵ 10-³
(1/3 -⁵)*(3-³)=3⁵*3-³=3=²9