16x < 1284
24x < 228
=> 4x < 28
=> x < 7
\(16^x< 128^4\)
\(\Rightarrow\left(2^4\right)^x< \left(2^7\right)^4\)
\(\Rightarrow2^{4x}< 2^{4.7}\)
\(\Rightarrow4x< 4.7\)
\(\Rightarrow x< 7\)
biet 16x<128 tim cac gia tri cua x
tim cac so tu nhien x biet :
a) 48 + 288 : ( x -3) = 50
b) 2x . 16 =128
tim x biet: 2x.4=128
tim (a,b) thuoc n*biet;b ,a/b=4/5 va BCNN=140 ;; a+b=128 va UCLN =16
tim x biet
2x+6=128
B2:tim so tu nhien x biet :
a)2^x.4=128
b)x^15=x
c)2^x.2^2^2=2^3^2
d)(x^5)^10=x
biet 16^x<128 .vay tap hop cac gia tri cua x =
tim x , y thuoc N biet
2x-2y=128
1.tim x thuoc n biet:
a)3 mu x .3 b)x mu 20 = x c)2 mu x.16 mu 2=1024 d)64.4 mu x=16 mu 8
2.tim n thuoc n sao:
a)3 mu 2.3 mu n=3 mu 5 b)(2 mu 2:4).2mu n=4 c)32<2 mu n<128 d)2.16>_2 mu n>4
ai giai dung va nhanh minh tick cho