Các câu hỏi tương tự
tim x biet (x+2)^2=81
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 z biet x-1/2=y-2/3=z-3/4 biet x-2y+3z=14
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 so nguyen x biet a) \(3^x=9^{-6}.27^{-5}.81^8\)
b) \(2^x=8^3.8^{-10}.8^3\)
tim so nguyen x: 2^3/3^x= 81/16
Tim x; biet |x-2|+|x-3|+|x-4|=2
tim x biet |x-2|-|2x+3|-x=-2
Tim x biet 2.(x-3)-3.(x-1)-5