1.(-1又1/2)*(-1又1/3)*(-1又1/4)*...(-1又1/2012) 2.已知x+1的绝对值=4,（y+2）的2次方=9,求x+y的值

1.(-1又1/2)*(-1又1/3)*(-1又1/4)*...(-1又1/2012) 2.已知x+1的绝对值=4,（y+2）的2次方=9,求x+y的值
1.(-1又1/2)*(-1又1/3)*(-1又1/4)*...(-1又1/2012) 2.已知x+1的绝对值=4,（y+2）的2次方=9,求x+y的值

1.(-1又1/2)*(-1又1/3)*(-1又1/4)*...(-1又1/2012) 2.已知x+1的绝对值=4,（y+2）的2次方=9,求x+y的值
1、原式=（-3/2）*（-4/3）*（-5.4）*……*（-2013/2012）=-2013/2
（原式中共有奇数个因子,所以得数符号为负
2、x=3或-5
y=1或-3
则x+y=4或0或-4或-8