Cho \(P = \left( { - 13} \right)\left( {153 - 45} \right) + 153.\left( {13 - 45} \right) + 125.{\left( { - 2} \right)^3}.{\left( { - 1} \right)^{2n}}\,\,\,\left( {n \in {N^*}} \rig...

* Hướng dẫn giải

Ta có:

\(\begin{array}{l}P = ( - 13.153) + (13.45) + (153.13) - (153.45) + 125.{\left( { - 2} \right)^3}.{\left( { - 1} \right)^{2n}}\,\,\,\\P = \left[ {(153.13) - (13.153)} \right] + \left[ {(13.45) - (153.45)} \right] + 125.\left( { - 8} \right)\,.1\,\,\\P = 0 + 45.(13 - 153) + 125.\left( { - 8} \right)\\P = 45.( - 140) - 1000\\P=-6300-1000\\P = - 7300\,\,\,\end{array}\)​