bài 1

a) \(8^7\times2^3-8^8=8^8-8^8=0\)

b) \(27-3^3=3^3-3^3=0\)

\(2^3\times4\div2^4=2^5\div2^4=2\)

Bài 2:

a) \(x-2^3=0\Rightarrow x=2^3\)

\(2^3-x=1\Rightarrow x=8-1\Rightarrow x=7\)

\(8-2^x=0\Rightarrow2^x=8\Rightarrow2^x=2^3\Rightarrow x=3\)

\(x^n=0\Rightarrow x=0\) với mọi \(n\in N\)

b) \(3^x=27\Rightarrow3^x=3^3\Rightarrow x=3\)

\(2^x\div2^5=1\Rightarrow2^x\div2^5=2^0\Rightarrow2^x=2^5\Rightarrow x=5\)

\(3^{2x}=0\Rightarrow3^{2x}=3^0\Rightarrow2x=0\Rightarrow x=0\)