Các câu hỏi tương tự
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
Tim x biet 2.(x-3)-3.(x-1)-5
1)tim x biet rang:
a)3^x-1=1/243
b)2^x+2^x+3=144
c)81^-2x.27x=9^5
2)tim tiep so ghang thu 5 cua day so sau:-1/a^2;2/a^3;-6/a^4;24/a^5;...
3)tim so tu nhien x biet :
a)4^x+4^x+3=4160
b)2^x-1+5.2^x-2=7/32
tim x y biet |x-1|+|x-2|+|y-3|+|x-4|=3
Tim x biet 1+1/2(1+2)+1/3(1+2+3)+...+1/x(1+2+3+...+x)=115
Tim x biet: x+1/1974+x+2/1973+x+3/1972=-3
Tim x biet |x+2| - |1-x| = 3
Tim x biet |x+2| - |1-x| = 3
Tim x biet |x+2| - |1-x| = 3