There is a rectangular prism that can fit 28 cubes with edge lengths of 1/2 inch each. What is the volume of this rectangular pr
1 answer:
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Answer:
(2, 5)
Step-by-step explanation:
Rotation clockwise 90° can be accomplished by the transformation ...
(x, y) ⇒ (y, -x)
so
(-5, 2) ⇒ (2, 5)
It follows from the definition of the binomial coefficient:
So we have
That is, gets absorbed into the numerator's factorial, and we introduct
into the denominator. Now,
, so we get
as required.