Question

tính nhanh:

9 x 9 x 9 x ... x 9(100 số 9) + 3 x 3 x 3 x 3 x ... x 3(200 số 3)

Answer 1

\(=\) \(9^{100}+3^{200}\)

\(=\left(3^2\right)^{100}+3^{200}\)

 \(=3^{200}+3^{200}\)

\(=2.3^{200}\)

Answer 2

\(=9^{100}+3^{200}\)

\(=\left(3^2\right)^{100}+3^{200}\)

\(=3^{200}+3^{200}\)

\(=\left(2\times3\right)^{100}\)

\(=6^{100}\)