\(16^x< 128^4\Rightarrow2^{4x}< 2^{7.4}\Rightarrow4x< 28\Rightarrow x< 7\)
\(\Rightarrow x\in\left\{0;1;2;3;4;5;6\right\}\)
Uả cài đúng không ta:v?
16x<1284
\(\Rightarrow\)(24)x<(27)4
\(\Rightarrow\)24.x<228
\(\Rightarrow\)4.x<28
\(\Rightarrow\)x<7
Vì x \(\in\)N nên x\(\in\){0,1,2,3,4,5,6}
16x<1284
⇒⇒(24)x<(27)4
⇒⇒24.x<228
⇒⇒4.x<28
⇒⇒x<7
Vì x ∈∈N nên x∈∈{0,1,2,3,4,5,6}
\(16^x<128^4\)
=> \((2^4)^x<(2^7)^4\)
<=> \(2^{4.x}<2^{7.4}\)
<=> \(2^{4.x}<2^{28}\)
<=>\(4.x<28\)
<=> \(4x=0;4;8;12;16;20;24\)
=> \(x={0;1;2;3;4;5;6\) }
16x<1284
⇒⇒(24)x<(27)4
⇒⇒24.x<228
⇒⇒4.x<28
⇒⇒x<7
Vì x ∈∈N nên x∈∈{0,1,2,3,4,5,6}
ban tham khao nha
