leehuan
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I actually gave up on this question because I still couldn't see anything but looking at it again...
I'm not sure if this is allowed, hence why I'm asking... but would I obtain my required result by just changing the order of summation (with the commutative law of multiplication in R)...?
I'm not sure if this is allowed, hence why I'm asking... but would I obtain my required result by just changing the order of summation (with the commutative law of multiplication in R)...?