1.Tim x la phan so biet
a,7 x X = 4
b,X x 2 =1
c,1 chia X = 3
d,4 chia X =9
mong mng giup do
1.Tim X la phan so,biet
a,7 x X bang 4
b,X x 2 bang 1
c,1 chia X
d,4 chia X bang 9
xin mn giup do
a)x=4:7=4/7
b)x=1:2=1/2
c)???
d)x=4:9=4/9
ban oi minh xin loi nhe cau c la 1 chia X bang 3.
xin loi ban ve su sai xot nay
a,7.x=4 b,x.2=1 c,1:x d,4:x=9
=\(\frac{4}{7}\) =0,5 =2,25
hok tốt /skr
1.Chia mot hinh vuong co dien tich 36cm vuong thanh 2 hinh chu nhat bang nhau.Tinh chu vi moi hinh chu nhat sau khi chia ra
2.Tim X la phan so,biet
a,7 x X=4
b,X x 2 = 1
c,1 chia X = 3
d,4 chia X = 9
giup minh voi
bai 1:tim so nguyen x sao cho gia cua cac phan so la so nguyen
a)x+3/x-2
b)x2+3x-2/x+2
chu y:dau / la dau chia trong phan so
bai 2:cho A=2n+1/n-2 voi n la so nguyen
a)tim n de a la phan so
b)tim n de A nguyen
c)tinh gia tri cua A biet:n=2;1;-2;-1
giup minh voi minh dang can.Ai dung minh tick cho
Tim x thuoc Z
a, A= x + 5 / x+1
b, B= 3x -5 / x + 4
c, C= x^2 - 7 . x + 5 / x- 3
tat ca deu la phan so nhe VD : x + 5 / x + 1 la :x + 5 phan x + 1
Mong cac ban giup do minh
giup minh voi
a, 2A co phai la so chinh phuong khong
b, tim so du cua a khi chia cho 13
c, tim so du cua b khi chia cho 31
d, tim x biet ,4b + 5 = 5^x=100
cam on mn da giup minh
1.Tim cac chu so x va y de so 1x8y2 chia het cho 36
2.tim cac gia tri nguyen cua n de phan so A=3.n+2/n-1 co gia tri la so nguyen
3.tim cac chu so x y thoa man
(x-2)^2.(x-3)^2=4
4.tim so tu nhien x biet
(x-5):3/100=20.x/100 +5
7+x/20+7+x/21=x+7/22+x+7/23+x+7/24 tim so huu ti x
/ la chia vd 7+x phan 20
a) tim gia tri nho nhat cua bieu thuc : A = | 1-x | + 8
b) tim cac so nguyen x biet 13 la boi cua x - 4
c) tim so nguyen x sao cho ( x + 5 ) chia het cho ( x + 3 )
giup minh voi! minh can gap gap gap.....
1.cho dãy số 6;7;9;12;16;.... số thứ 100 của dãy số trên là
2.cho day so 2,3,5,9,17,33,65,129,... Tim so thu 11 cua day
3 .tim 2 phan so biet tich cua chung =8/15 .Biet cong them 4 vao phan so thu nhat thi tich hai phan so la 56/15
4.a chia 4 du 3;a chia 9 du 5 .Hoi a chia 36 du bao nhieu
5.tim(x;y) biet -|2x+4| -|y+5| lon hon bang 0 .Tim cap (x;y)
6.cho phan so a,b toi gian .chung minh 1-(a/b) toi gian
7.so sanh tong s=1/2+2/2^2+......+2015/2^2015 voi 2
8.tim a nho nhat sao cho khi chia a cho 7du 4 ,cho 11 du 6 ,cho 17 du 9
9.tim so tu nhien a va b ,a-b =5 va (a,b)/[a,b]=1/6
10. 3x+3x-1+3x-2=1053
11.5.36^9.4^6 -2.12^14.3^6/5.2^28.3^19-7.2^29.3^18
12.tìm n để n^2-7 chia hết n+3
13.2.2+4.4+6.6+....+98.98