Esercizi svolti per il libro Matematica.blu: Algebra, Geometria, Statistica, Vol. 1 con autore Massimo Bergamini, Anna Trifone, Graziella Barozzi
Domanda
(a−b)3:3b+2a3:(4b)−b(a+b)2:(2a−3)2(a-b)^3:3b+2a^3:(4b)-b(a+b)^2:(2a-3)^2(a−b)3:3b+2a3:(4b)−b(a+b)2:(2a−3)2 per a=6a=6a=6 e b=3b=3b=3.
Soluzione
(6−3)33⋅3+2⋅634⋅3−3⋅(6+3)2(2⋅6−3)2\dfrac{(6-3)^3}{3\cdot 3} + \dfrac{2 \cdot 6^3}{4 \cdot 3} - \dfrac{3 \cdot (6+3)^2}{(2\cdot6 - 3)^2}3⋅3(6−3)3+4⋅32⋅63−(2⋅6−3)23⋅(6+3)2 === 339+2⋅21612−3⋅92(12−3)2\dfrac{3^3}{9}+\dfrac{2 \cdot 216}{12} - \dfrac{3 \cdot 9^2}{(12-3)^2}933+122⋅216−(12−3)23⋅92 === 279+43212−3⋅8192\dfrac{27}{9}+\dfrac{432}{12} - \dfrac{3 \cdot 81}{9^2}927+12432−923⋅81 === 3+36−3⋅81813+36-\dfrac{3 \cdot \cancel{81}}{\cancel{81}}3+36−813⋅81 === 3+36−3=363+36-3=363+36−3=36