Question

2 la puterea 1x2 la putera 2x2 la puterea 3x2 la puterea 4x.....x2 la putera 45

repede va rog frumos dau coroana

Answer 1

2¹ x 2² x 2³ x 2⁴ x ...........x 2⁴⁵ = 2 ⁽¹⁺²⁺³⁺⁴⁺........⁺⁴⁵) = 2¹⁰³⁵

1 + 2 + 3 + 4 + ........+ 45 = 45 x ( 1 + 45 ) : 2 = 45 x 46 : 2 = 45 x 23 = 1 035 
   am aplicat formula sumei lui Gauss

Answer 2

2¹x2²x2³x2⁴x.....x2⁴⁵=2⁽¹⁺²⁺³⁺⁴⁺....⁺⁴⁵⁾=2¹⁰³⁵
formula  1+2+3+...+n=n(n+1)/2
1+2+3+4+...45=45x46/2=1035