2^(x+3)-3*2^(x+1)+2^x<12

Question

2^(x+3)-3*2^(x+1)+2^x<12

Answer 1

2^x*(8-3*2+1)<12<br>2^x*3<12<br>2^x<4<br>x<2<br>x∈(-∞;2)