Câu hỏi của Nguyễn Thị Ngọc Bích

Question

tính s = 1 + 2 - 3 - 4 + 5 + 6 - 7 - 8 + 9 + 10 -... + 2018 - 2019 - 2020 + 2021

Trần Đình Thiên · Accepted Answer

S=1+2-3-4+5+6-7-8+9+10-...+2018-2019-2020+2021

=1+(2-3-4+5)+(6-7-8+9)+...+(2018-2019-2020+2021)

=1+0+0+...+0

=1

Vậy S=1Câu trả lời: S=1+2-3-4+5+6-7-8+9+10-...+2018-2019-2020+2021

=1+(2-3-4+5)+(6-7-8+9)+...+(2018-2019-2020+2021)

=1+0+0+...+0

=1

Vậy S=1

Nguyễn Đức Trí · Answer

S=1+2−3−4+5+6−7−8+9+10−...+2018−2019−2020+2021

S=0+1-1+1-1+...-1-+1=0S=0+1−1+1−1+...−1−+1=0Câu trả lời: S=1+2−3−4+5+6−7−8+9+10−...+2018−2019−2020+2021

S=0+1-1+1-1+...-1-+1=0S=0+1−1+1−1+...−1−+1=0