lap trinh bai toan sau:pascal
tinh gia tri bieu thuc
s:=2014+1*4/2*3+2*5/3*4+3*6/4*5+...+2012*2015/2013*2014
giup mik voi a
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
mik ko hieu. vi sao phai xuong hang
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
Bài 1:
a: Để A là phân số thì n+1<>0
hay n<>-1
b: Để A là số nguyên thì \(n+1\in\left\{1;-1;5;-5\right\}\)
hay \(n\in\left\{0;-2;4;-6\right\}\)