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Question Number 91690 by zainal tanjung last updated on 02/May/20

Commented by zainal tanjung last updated on 03/May/20

$$\mathrm{Hint}=\mathrm{Formula}$$$$\bullet \frac{\mathrm{n}(\mathrm{n}+1)}{2}$$$$\bullet \frac{\mathrm{n}(\mathrm{n}+1)(2\mathrm{n}+1)}{6}$$$$\bullet {\left[\frac{\mathrm{n}(\mathrm{n}+1)}{2}\right]}^2$$$$$$

Answered by malwaan last updated on 02/May/20

$$1\frac{50\times 51}{2}=25\times 51=1275$$$$2\frac{113\times 114}{2}=113\times 57=6441$$$$3\frac{196(196+1)(2\times 196+1)}{6}$$$$=2529086$$

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