Question

若3x+1的绝对值与{y+1}的平方是互为相反数,求：xy的值； x立方的相反数-y的100次方

Answer 1

|3x+1|+(y+1)^2=0

3x+1=0,y+1=0

x=-1/3,y=-1

xy=(-1/3)×(-1)=1/3

-x^3-y^10

=-(-1/3)^3-(-1)^10

=1/27-1

=-26/27