\(\left(\dfrac{1}{16}\right)^{x+2}=\left(\dfrac{1}{32}\right)^6\)
\(\Leftrightarrow\dfrac{1}{16^{x+2}}=\dfrac{1}{32^6}\)
\(\Leftrightarrow\dfrac{1}{2^{4x+8}}=\dfrac{1}{2^{30}}\)
\(\Leftrightarrow4x+8=30\Leftrightarrow4x=22\Leftrightarrow x=\dfrac{11}{2}\)
tìm x biết (1/16)^x=(1/2)^10
2//Tìm n ∈ N biết
a)\(2008^n=1\)
b)\(32^{-n}.16^n=1024\)
c)\(\frac{4^5+4^5+4^5+4^5}{3^5+3^5+3^5}.\frac{6^5+6^5+6^5+6^5+6^5+6^5}{2^5+2^5}=2^n\)
3/Tìm các số tự nhiên x,y biết
a)\(2^{x+1}.3^y=12^x\)
b)\(10^x:5^y=20^y\)
các bạn giúp mình với!!!!!!HELP ME !!!!!
Tìm số nguyên x, nếu biết:
a.32x+2=910
b.33x-=2713
c.2x=46.163
d.2x=325.646
tìm x biết (4/9)x+1=(8/27)^6
tìm x biết (4/9)x+1=(8/27)^6
a) \(\dfrac{5^5}{5^x}=5^{18}\)
b) \(\dfrac{2^{4-x}}{16^5}=32^6\)
c) \(\dfrac{2^{2x-3}}{4^{10}}=8^3.16^5\)
d) \(\dfrac{2^3}{2^x}=4^5\)
e) \(9.5^x=6.5^6+3.5^6\)
f) \(7.2^x=2^9+5.2^8\)
bài 1 tìm các số nguyên x,y biết a)2^x=8
b) 3^4=27
c)(-1,2).x=(-1,2)^4
d)x:(-3/4)=(-3/4)^2
e)(x+1)^3=-125
f)(x-2)^3=64
bài 2 tìm các số nguyên x,y biết
a)(x-1,2)^2=4
d)(x-1,5)^2=9
e)(x-2)^3=64
Tìm x:
a, (\(\dfrac{1}{3}\)+ \(\dfrac{1}{6}\)) .\(2^x\)+ \(2^{x+1}\)= \(2^{12}\)+\(2^{10}\)
b, (\(\dfrac{1}{2}\)- \(\dfrac{1}{6}\)) . \(3^x\)+ \(3^{x+2}\)= \(3^{16}\)+\(3^{13}\)
`(x+1)/16-(2x-1)/8=(-x-8)/2`
