The result of calculation (2 / 3) ^ 2015 * 1.5 ^ 2014 * (- 1) ^ 2016 is

The result of calculation (2 / 3) ^ 2015 * 1.5 ^ 2014 * (- 1) ^ 2016 is

(2/3)^2015×1.5^2014×(-1)^2016
=(2/3)×(2/3)^2014×(3/2)^2014×1
=(2/3)×[(2/3)×(3/2)]^2014
=(2/3)×1^2014
=(2/3)×1
=2/3

The mathematical solution equation of the first grade of junior high school: (y + 4) / 5 - (Y-5) = (y + 3) / 3 - (Y-2) / 2

(y + 4) / 5 - (Y - 5) = (y + 3) / 3 - (Y - 2) / 2 multiply by 30 at the same time to get 6 (y + 4) - 30 (Y - 5) = 10 (y + 3) - 15 (Y - 2) 6y + 24 - 30y + 150 = 10Y + 30 - 15y + 30 - 24y + 174 = - 5Y + 6019y = 114y = 6

2007÷(2007+2007/2008)+1/2009

=2007÷[2007×(1+1/2008)]+1/2009
=1÷(1+1/2008)+1/2009
=2008/2009+1/2009
=1

(1/2009-1)*(1/2008-1)*(1/2007-1)*…… *(1/3-1)*(1/2-1)

The product is positive
(1/2009-1)*(1/2008-1)*(1/2007-1)*…… *(1/3-1)*(1/2-1)
=(1-1/2)*(1-1/3)*...*(1-1/2008)*(1-1/2009)
=1/2*2/3*3/4*...*2007/2008*2008/2009
=1/2009