Question

Answer 1

Bài 8:

a: \(\left(2^{17}+17^2\right)\left(9^{15}-3^{15}\right)\left(2^4-4^2\right)\)

\(=\left(2^{17}+17^2\right)\left(9^{15}-3^{15}\right)\left(16-16\right)\)

=0

b:Sửa đề: \(\left(8^{2017}-8^{2015}\right):\left(8^{2014}\cdot8\right)\)

\(=\frac{8^{2015}\left(8^2-1\right)}{8^{2015}}\)

\(=8^2-1\)

=64-1

=63

Bài 7:

a: \(3^{x}\cdot3=243\)

=>\(3^{x}=\frac{243}{3}=81=3^4\)

=>x=4

b: \(2^{x}\cdot16^2=1024\)

=>\(2^{x}=\frac{1024}{256}=4=2^2\)

=>x=2

c: \(64\cdot4^{x}=16^8\)

=>\(4^{x}\cdot4^3=\left(4^2\right)^8=4^{16}\)

=>x+3=16

=>x=13

d: \(2^{x}=16\)

=>\(2^{x}=2^4\)

=>x=4