` color{#e6f0ff}{@}color{#c7ddff}{Sp}color{#99c2ff}{i}color{#66a3ff}{di}color{#3385ff}{e}color{#0066ff}{rC}color{#0044cc}{o}color{#002d80}{ol}color{#001b4d}{er}color{#000a1a}{@} `

` c) 2 * 2 * 2 * 2 * 2 * 2 * 4 `

` = 2 * 2 * 2 * 2 * 2 * 2 * 2 * 2 `

` = 2^8 `

` d) 3 * 27 * 3 * 3 * 9 `

` = 3 * 3 * 3 * 3 * 3 * 3 * 3 * 3 `

` = 3^8 `

Bài ` 18 : `

` a) 6 * 6 * 6 = 6^3 `

` b) 7 * 49 * 7 * 7 * 7 `

` = 7 * 7 * 7 * 7 * 7 * 7 `

` = 7^6 `

` c) 8 * 64 * 8 * 64 `

` = 8 * 8 * 8 * 8 * 8 * 8 `

` = 8^6 `

` d) a * a * a * a * a `

` = a^5 `