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rezolvati urmatorul exercitiu

2 la puterea 1• 2 la puterea 2• 2 la puterea 3• 2 la puterea 4 ...•2 la puterea 45


Răspuns :

1 +2+3 +...+ 45 = ( 1 + 45 ) · 45  /  2 = 46 · 45  /  2 = 23 ·45 = 1035
2  ¹ · 2² · 2³············· 2⁴⁵ =  2 ¹⁺²⁺³⁺ ··········⁺  ⁴⁵   = 2¹⁰³⁵