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# Summation of finite series Watch

1. $\frac{1}{1X4X7}+\frac{1}{4X7X10 }+\frac{1}{7X10X13}+...$

$\frac{1}{(3n-2)(3n+1)(3n+4)}$ is the general formula correct?
2. (Original post by cucumberpj)
$\frac{1}{1X4X7}+\frac{1}{4X7X10 }+\frac{1}{7X10X13}+...$

$\frac{1}{(3n-2)(3n+1)(3n+4)}$ is the general formula correct?
Yes.

By the way, you can use /times

3. (Original post by BabyMaths)
...
You mean \times.
4. (Original post by Khallil)
You mean \times.
I do, thank you.

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