Question Number 188564 by BaliramKumar last updated on 03/Mar/23
$$\mathrm{1}×\mathrm{2}+\mathrm{2}×\mathrm{3}+\mathrm{3}×\mathrm{4}+...............+\mathrm{24}×\mathrm{25}\:=\:? \\ $$
Answered by universe last updated on 03/Mar/23
$$\left(\mathrm{1}^{\mathrm{2}} +\mathrm{1}\right)+\left(\mathrm{2}^{\mathrm{2}} +\mathrm{2}\right)+\left(\mathrm{3}^{\mathrm{2}} +\mathrm{3}\right)+......\left(\mathrm{24}^{\mathrm{2}} +\mathrm{24}\right) \\ $$$$\mathrm{4}×\mathrm{25}×\mathrm{49}+\mathrm{12}×\mathrm{25}\:=\:\mathrm{5200} \\ $$
Commented by BaliramKumar last updated on 03/Mar/23
$${typo}\:{sir}\:\:\:\mathrm{13}\rightarrow\mathrm{25}\:\:\:\:\:\:\:\:{thanks} \\ $$
Commented by universe last updated on 03/Mar/23
$${thanks} \\ $$