GIúp mik vs. 8h nộp r

`M = 3 – 3∧2 + 3∧3 – 3∧4 + … + 3∧2015 – 3∧2016`
`Ta` `có` `:` `3M = 3∧2 – 3∧3 + 3∧4 – 3∧5 + … + 3∧2016 – 3∧2017`
          `=> 3M + M = 3 + (3∧2 – 3∧2 ) + (3∧3 – 3∧3 )+ … + (3∧2016 – 3∧2016 ) – 3∧2017`
                `4M = 3 + 0 + 0 + . . . + 0 – 3∧2017`
                `4M = 3 – 3∧2017`
`=> M = (3 – 3∧2017 ) : 4`

( ∧ : là mũ nha )