Question

4.arătati ca rezultatul calculului [(1^15-1^18):1^45+1^60:(1^12-1^15)]1 intreg 1^2este numar natural​

Answer 1

Răspuns:

[(⁶⁾1/15-⁵⁾1/18):1/45+1/60:(⁵⁾1/12-⁴⁾1/15)]:(1×2+1)/2=

(1/90×45/1+1/60×60/1):3/2=

(45/90+60/60)×2/3=

(1/2+²⁾1)×2/3=

(1/2+2/2)×2/3=

3/2×2/3=6/6=1 ∈ N