Question

Fie Sa suma alementelor multimii:A={n | n=3k,k apartine M} unde M={-1,-2,-3,...,-100} si Sb suma elementelor multimii B={n|n=4k, k apartine M}.Calculati Sa supraSb si (Sa supra Sb)la -1

Answer 1

A = {-3, -6, -9.........-300}
B = {-4, -8, -12, ......-400}

$\frac{ S_{a} }{ S_{b}} = \frac{3(-1 -2-3-......-100)}{4(-1 -2-3-......-100)} = \frac{3}{4}$