Use universal instantiation or universal modus ponens to fill in a valid conclusion for the argument. V real numbers r, a, and b, if r is positive, then (ryb - pab r= 3, a = 1/2, and b = 6 are particular real numbers such that r is positive. O (3(1/2),6 - 3((1/2)(6)) O ((-3)1/2)-6 - (-3)(1/2)(-6) O (3(1/2)6 - 3((1/2)(6)) O (1/2))6 = (1³)(2°) ((-3)1/2)6 = (-3)(1/2)(6)

Prove or disprove each of the following statements. To disprove just give a counter example.   Believe the statement is true but not sure how to prove it 2 can be represented as 4 irrational numbers by sqrt(2) * 1/sqrt(2) * 2sqrt(2) * 1/sqrt(2)

Use DeMoivre's Theorem to find the following. Write your answer in standard form. 3 (-4 - 41) O- 128 7 128 - 1281 O - 128 - 1281 128 + 1281 - 128 + 128i

Help me please