Hi,

Someone give me a hand in checking these please.

a.) Given that , and for the real numbers , and , show that .

...1

is +ve...2

...3

If then is +ve

Putting values using lines 2 and 3

OR

...................OR+ve

therefore must be true

b.) Show that if x, y ∈R, and , then for any real number , .

...1

is -ve

...3

If then is -ve

Putting in values using lines 2 and 3

.......................OR

................OR

therefore must be true