=\(\left(\frac{3}{4}\right)^{2016}\).[\(\left(\frac{1}{4}\right)^2\)-\(\left(\frac{7}{4}\right)^2\)]
=\(\left(\frac{3}{4}\right)^{2016}\).(-3)
=\(\left(\frac{-9}{4}\right)^{2016}\)
Tính: S = 1 - 2 + 3 - 4+ ... + 197 -198 + 199 -200
Tính: P = (-1) + (-2) + (-3) + .... + (-99) + (-100)
Tìm các số nguyên x, biết:
a) x2 - 1 = -54 - 43 - 32 - (-6971) - (-20170)
b) 7(x-1) < 0 và x > -11
c) -10(x - 2016) - 7(x - 2016) - 6(x-2016) - 4(x -2016) - 3(x - 2016) = -30
tính nhanh
A=1+3-5+7-..........-2013+2015
B=1-2+3-4+...................2015-2016
C=1-2-3+4+5-6-6+8+...........+2013-2014-2015+2016
D=1-4+7-10+.....-2014+2017
E=1+2-3-3+5+6 -.......+2013+2014-2015-2016
F=1-2+3-4+..........+2015+2016
G=1+3-5-7+9+11.............-2013-2015
H=1-2-34+5-6-7+8+.................+1013-1014-1015+1016
1+2+3+4+...+2016+2017+2018
1+2+3+4+...+2016+2017+2018
a] 4 mu 2016: 4 mu 2015 + 10.10 mu 2 =
b] 3 mu 4 . 47 . 63 - 3 mu 4 . 10 =
c] 2016 : { 2464 : [171 - 5 ( 9 mu 2 - 7 mu 2)]} =
d] 1 + 3+ 5 +....... + 2011 + 2013=
Cho S=1/4+2/4^2+3/4^3+.......+2016/4^2016
Chứng tỏ rằng S<1/2
Cho tong gom 2016 so hang : s=1/4+2/4^2+3/4^3+4/4^4+......+20166/4^2016
Cho M\(=1+2016+2016^2+2016^3+2016^4+2016^5+2016^6+2016^7.\)
Chứng minh M chia hết cho 2007
bài 7:tính
A=1-2+3-4+5-6+......+2015-2016
B=1+2-3-4+5+6+......+2013+2014-2015-2016
C=1-4-7-10-......-100
bài 8:tìm x thuộc z biết:
a,x.(x+2)=0
b,(x+2).(x-4)=0
D=1+1/2(1+2)+1/3(1+2+3)+1/4(1+2+3+4)+...+1/2016(1+2+...+2016)