Timx,y biet :x2 +x×y-x-y=3
timx biet x^2-6x=-9
1,timx,y biet
a,/x-7/+5=2x-3
b,4x-/5-x/2=2
c,/4x-3/+/5y+7,5/=0
2,tim gia tri nho nhat cua bieu thuc sau
A=/3,7-x+25/
B=/2x+1/+/y-2/+2018
timx y biet
x/3=y/5 va x+ 2y = 39
a,timx;y sao cho 2^x=4^y-1; 27^y= 3^x+8
b,tim ba phan so biet rang tong cua chung bang 3 3/7(hon so),cac tu cua chung ti le voi 3,4,5,cac mau cua chung ti lt voi5,1,2
timx,y thuoc z biet:\(\frac{1}{18}<\frac{x}{12}<\frac{y}{9}<\frac{1}{4}\)
co (1+1/1*3)*(1+1/2*4)*.......*(1+1/x*(x+2))=4016/2007
timx thoa man
lam on giup minh nhanh len
Timx:\(\left|x-1\right|+\left|x-2\right|+...+\left|x-100\right|=2500\)
bai 1
timx,y,z,t
x=2y=3z=4t va y-z=2
bai 2
biet xti le nghich voi y theo he so ti le k
y ti le nghich voi z theo he so b
hay tim moi tuong quan giua x va z
bai 3hoc sinh ba lop 7a,7b,7c cung dao dat
7a xong trong 2 gio
7b xong trong 2,5gio
7c xong trong 3 gio tinh so hoc sinh moi lop biet lop 7a nhieu hon 7b 10 em