tinh gia tri bieu thuc: 

-1-2+3+4-5-6+7+8-9-10+11+12-...-2013-2014+2015+2016

tinh gia tri bieu thuc

A= 2/3+2/5-2/9

     4/3+4/5-4/9

TRONG SACH BAI TAP TOAN 6 TRANG 30

cho A=1*4/2*3 + 2*5/3*4+3*6/4*5+.....+2013*2016/2014*2015 . Chứng minh 2012< A < 2013

A=1+2-3-4+5+6-7-8-...-2012+2013+2014-2015-2016

cho phan thuc A = \(\frac{2014+\frac{2013}{2}+\frac{2012}{3}+....+\frac{2}{2013}+\frac{1}{2014}}{\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+....+\frac{1}{2014}+\frac{1}{2015}}\)

Tinh gia tri cua phan thuc

Tinh cac gia tri bieu thuc sau:

 C= c*5/4 +c* 1/6-c* 17/12 voi c=2013/2014

a) 2x-1/11+2x-2/12+2x-3/13=2x+5/5+2x+6/4+2x+7/3

b) x-1/2016+x-2/2015+x-3/2014+x-4/2013+x-5/2012 -5=0

c) x+2017/2+x+2015/3+x+2013/4+x+2011/5+8=0

Tìm x

a, x+1/2 + x+2/3 + x+3/4 + x+4/5 + ....+ x+5/6=5

b, x+1/2017 + x+2/2016 + x+3/2015 = x+4/2014 + x+5/2013 + x+6/2012

bai 1

cho bieu thuc A = 5/n+1 voi N THUOC Z

a, de A la phan so thi n co dieu kien gi ?

b , tim tat ca cac gia tri nguyen cua n de gia tri A la 1 so nguyen ?

bai 2

cho bieu thuc M = 6/n-3 voi n thuoc Z .Co bao nhieu gia tri cua n de :

a, M ko phai la phan so

b , M la phan so va cp gia tri nguyen ?

bai 3 viet tap hop cacs so nguyen sao cho :

-12/4 < x <6/3