tim x biet : /x+5/+/3-x/=8

De tim so tu nhien x ,biet rang neu lay so do tru di 3 roi chia cho 8 thi dc 12 ,ta co the viet (x-3) :8=12roi tim x , ta duoc x =99.

Bang cach lam nhu tren ,hay tim so tu nhien x,biet rang neu no nhan voi 3 roi tru di 8 ,sau do chia cho 4 thi dc 7

tim x nguyen duong biet 1/x(x+3)+1/(x+3)(x+6)=3/8

tim x biet (2.|x|+3).4-8=|-20|

Tim x, biet : 5/4 nhan x = 5/8 + 3/12

tim x biet 

8+3.X=68

tim x,y thuoc N biet (x-6).(2y+3)=8

de tim so tu nhien x ,biet rang neu lay so dotru di 3 roi chia cho 8 thi dc12 ,ta co the viet (x-3) :8 =99

dang cach lam nhu tren ,hay tim so tu nhien x ,biet rang nhan 3 roi turu di 8 ,sau chia 4 thi dc 7

a, Cho F(x)  = a x+b . Tim a,b biet f(0) = 3 va  F(2) =-1

b, Cho F(x) =a x+ b. Tim a,b biet F(1) = -1 va F(-2) = 8 

c, Cho F(x) =a x +b .tim a,b biet F(0) = 1 va F(-2) = -9