a=-2013*2013-2013/2012*2012+2012,b=-2014*2014-2014

1个回答

  • a = (-2013*2013-2013)/(2012*2012+2012) = -(2013*2013+2013)/(2012*2012+2012)

    b = (-2014*2014-2014)/(2013*2013+2013) = -(2014*2014+2014)/(2013*2013+2013)

    c = (-2015*2015-2015)/(2014*2014+2014) = -(2015*2015+2015)/(2014*2014+2014)

    abc

    = -(2015*2015+2015)/(2012*2012+2012)

    = -[2015*(2015+1)]/[2012*(2012+1)]

    = -(2015*2016)/(2012*2013)

    = -(2015*168*4*3)/(4*503*671*3)

    = -(2015*168)/(503*671)

    = -338520/337513