Question

Tính C:

C=2^0+2^1+2^2+2^3+2^0.2^1.2^2.2^3

Tính D:

D=(2^0+2^1+2^2+2^3).2^0.2^1.2^2.2^3

Answer 1

c=1+2+4+8+64

=79

Answer 2

\(C=2^0+2^1+2^2+2^3+2^0+2^1+2^2+2^3\)

\(=\left(2^0.2\right)+\left(2^1.2\right)+\left(2^2.2\right)+\left(2^3.2\right)\)

\(=2+4+8+16\)

\(=\left(2+8\right)+\left(4+16\right)\)

\(=10+20\)

\(=30\)

\(D=\left(2^0+2^1+2^2+2^3\right).2^0.2^1.2^2.2^3\)

\(=\left(1+2+4+8\right).1.2.4.8\)

\(=\left(8+2+4+1\right).1.2.4.8\)

\(=\left(10+4+1\right).1.2.4.8\)

\(=15.1.2.4.8\)

\(=\left(15.2\right).1.4.8\)

\(=30.1.4.8\)

\(=120.8\)

\(=960\)