(1/x) + (1/y) + (1/z) is a minimum value when x=y=z=10.
Symmetry gives either maximum or minimum value.
15
A positive answer.
Yes, a positive plus a positive and a positive times a positive both equal a positive.
If, and only if the positive value is > the negative value.
Yes.
Another positive number.
Positive 8
A positive plus a positive will equal a positive. However a negative minus a negative will not equal a negative. It will equal a positive.
No it equals negative. (-)+(+)=(-)
No, it equals a positive. (+)+(+)=(+)
positive 10
Blood type A positive plus A negative equals blood type A positive.