What is she doing tonight? She is go jogging.

\(D=4+4^2+4^3+4^4+...+4^{100}\)

\(4D=4^2+4^3+4^4+4^5+...+4^{101}\)

\(4D-D=\left(4^2+4^3+4^4+4^5+...+4^{101}\right)-\left(4+4^2+4^3+4^4+...+4^{100}\right)\)

\(3D=4^{101}-4\)

\(D=\dfrac{4^{101}-4}{3}\)

\(#WendyDang\)

Buổi tối vui vẻ ạ: ^^ _{ròi má cày típ đy}

:)