g If an inner product space X is real, show that the condition Ilxll = Ilyll implies (x + y, x - y) = O. What does this mean geometrically if X = R2? What does the condition imply if X is complex?

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)