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Question Number 115072 by A8;15: last updated on 23/Sep/20

Commented by A8;15: last updated on 23/Sep/20

please help with the solution

Answered by 1549442205PVT last updated on 23/Sep/20

$$\mathrm{Opening}\mathrm{brackets}\mathrm{we}\mathrm{get}$$$$\mathrm{S}=2020-(2019-(2018-(2017-$$$$(2016-(....(2-1)...)$$$$=2020-2019+2018-2017+...$$$$+2-1=(2020-2019)+(2018-2017)+$$$$+...+(2-1)=1+1+...+1=1010$$$$(\mathrm{Since}\mathrm{all}2020\mathrm{terms}\Rightarrow 1010\mathrm{sums})$$

Commented by A8;15: last updated on 23/Sep/20

thank you sir

Answered by JDamian last updated on 23/Sep/20

$$d)1010$$

Commented by A8;15: last updated on 23/Sep/20

how ? I need a solution

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