Question

/=fractie
1/43+2/43+3/43.......+86/43

coroana si 55 p

Answer 1

Răspuns:

1/43 + 2/43 + 3/43 + ........ + 86/43 = 87

Explicație pas cu pas:

1/43 + 2/43 + 3/43 + ........ + 86/43 = ?

1/43 + 2/43 + 3/43 + ........ + 86/43 =  (1+2+3+....+86)/43

1+2+3+.....+86 = (1+86)·86:2 = 87·43

(1+2+3+....+86)/43 = (87·43)/43 = 87

1/43 + 2/43 + 3/43 + ........ + 86/43 = 87

Answer 2

$\frac{1+2+3+...+86}{43}=\frac{(87*86):2}{43} =\frac{3741}{43}$

Sper ca te-am ajutat!