Question

Thực hiện phép tính A=1-5-9+13+17-21-25+29+.......+2001-2005-2009+2013+2017

Answer 1

\(A=1-5-9+13+17-21-25+29+.......+2001-2005-2009+2013+2017\)\(A=\left(1-5-9+13\right)+.........+\left(2001-2005-2009+2013\right)+2017\)

\(A=0+0+...............+2017\)

\(A=2017\)

Answer 2

giúp mình nha mai mình cần gấp rồi

Answer 3

Ta có:

N= (1-5-9+13) + (17-21-25) +...+ ( 2001-2005-2009+2013)

N= 0 + 0 +...+ 0

N= 0

Vậy N=0.

Answer 4

\(A=1-5-9+13+17-21-25+29+...+2001-2005-2009+2013+2017\)

\(=\left(1-5-9+13\right)+\left(17-21-25+29\right)+...+\left(2001-2005-2009+2013\right)+2017\)

\(=0+0+..+0+2017\)

\(=2017\)