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4-20-4-7-20-30-4-7-10-20-30-40-




Question Number 177711 by infinityaction last updated on 08/Oct/22
(4/(20))+((4.7)/(20.30))+((4.7.10)/(20.30.40))+.....
$$\frac{\mathrm{4}}{\mathrm{20}}+\frac{\mathrm{4}.\mathrm{7}}{\mathrm{20}.\mathrm{30}}+\frac{\mathrm{4}.\mathrm{7}.\mathrm{10}}{\mathrm{20}.\mathrm{30}.\mathrm{40}}+….. \\ $$

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