1.2^2+2.3^2+…+49.50^2 Các bạn giúp mk vs ạ 20/08/2021 Bởi Maya 1.2^2+2.3^2+…+49.50^2 Các bạn giúp mk vs ạ
$\color{blue}{1.2^2+2.3^2+…+49.50^2}$ $\color{blue}{= (1.2+2.3+3.4+….+49.50)^2}$ $\color{blue}{= (49.50.51)^2}$ $\color{blue}{= 41650^2}$ Bình luận
$\color{blue}{1.2^2+2.3^2+…+49.50^2}$
$\color{blue}{= (1.2+2.3+3.4+….+49.50)^2}$
$\color{blue}{= (49.50.51)^2}$
$\color{blue}{= 41650^2}$