S= 2-1-2-3-4-....-201-202
= 2-(1+2+3+4+....+202)
=2- (202:2)( 202+1)
= 2- 101.203
Các câu hỏi tương tự
Tinh gia tri cua bieu thuc :
a) A= 5a^3 b^4 voi a = -1, b = 1
b) B = 9a^5 b^2 voi a = -1, b = 2
Giup minh voi minh dang can cuc gap.
☹➞cac ban giup minh cau nay voi
☛ tinh tong
M = 1+\(\dfrac{1}{5}\)+\(\dfrac{3}{35}\)+...\(\dfrac{3}{9603}\)+\(\dfrac{3}{9999}\)
➜giup minh nhanh nhe minh dang can gap lam moi nguoi a
➞thank you cac ban ❕
Tính nhanh : a) -1-2-3-4-5-.....-199-200-201-202 b) 1+2-3-4+5+6-7-8+9+10-11-12+13+98-99-100+101+102
Giai chi tiet giup minh nha !!! Minh tich cho !!
1
15-5.(x+4)=-12-3
giup minh voi minh dang can gap
Tinh nhanh ( neu co the ) : 4^2017 : ( 4^2014 + 3 . 4^2014 )
Mik dang can gap moi nguoi giup minh voi a
Q= 1/2! + 2/3! + 3/4! + ... + n-1/n!
Chung minh rang : Q<1
Minh dang can gap. Giup minh voi!!
P=3^0+3^1+3^2+...+3^99 giup minh voi!!
minh dang can gap ai do giup minh de
Tính :
S1= 1-2+3-4+....................+2017-2018
S2= 1-4+7-10+..............+2015-2018
S3= 1+2-3-4+.....................+2015+2016-2017-2018
Giup minh voi minh dang can gap nha
ai nhanh ma dungthi minh tich cho nha
Tim chu so tan cung cua 2 mu 10993 ; 3 mu 16 nhan 5 ; 3 mu 1993 : giup minh voi minh dang can gap