若1²+2²+3²+…+25²=5525,计算3²+6²+9²+…+75²的值.
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/20 05:17:21
![若1²+2²+3²+…+25²=5525,计算3²+6²+9²+…+75²的值.](/uploads/image/z/13954048-16-8.jpg?t=%E8%8B%A51%26%23178%3B%2B2%26%23178%3B%2B3%26%23178%3B%2B%E2%80%A6%2B25%26%23178%3B%3D5525%2C%E8%AE%A1%E7%AE%973%26%23178%3B%2B6%26%23178%3B%2B9%26%23178%3B%2B%E2%80%A6%2B75%26%23178%3B%E7%9A%84%E5%80%BC.)
x){ѽPMZJCG
˴L![SS#S>_7&o-ԛC?aMR>/?6
m*O;h<<n9_\g
͊D
若1²+2²+3²+…+25²=5525,计算3²+6²+9²+…+75²的值.
若1²+2²+3²+…+25²=5525,计算3²+6²+9²+…+75²的值.
若1²+2²+3²+…+25²=5525,计算3²+6²+9²+…+75²的值.
1²+2²+3²+…+25²=5525
3²+6²+9²+…+75²
=3²×(1²+2²+3²+…+25²)
=9×5525
=49725