QI.
1 answer:
What we're trying to do here is pairing elements of A with elements of B, and the rule for pairing them is that the least common multiple must be 2.
We can't use zeroes, because every multiple of 0 is still 0.
We can't either use numbers greater than 2, because their multiples will be greater than 2.
After this trimming, we're left with the following subsets:
So, the possible couples are:
The first couple is obviously not good, because the least common multiple of 1 and 1 is 1.
The other three are ok, because the least common multiple of 1 and 2 or 2 and 2 is 2.
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now, the "x" is a constant, the rocket is going up, so "y" is changing and so is the angle, but "x" is always just 15 feet from the observer. That matters because the derivative of a constant is zero.
now, those are the values when the rocket is 30 feet up above.