Question

what is the mean proportional of (x+y)² and (x-y)²

give the correct answer and I will give u thirty thanks​

Answer 1

Answer:

If mm is the mean proportion of aa and bb, then it means that a,m,ba,m,b are in geometric progression. In other words,

ma=bmma=bm

This means that

m2=abm2=ab

⟹m=±ab−−√⟹m=±ab

So, in the given case, the mean proportion is

±(x+y)2(x−y)2−−−−−−−−−−−−−√±(x+y)2(x−y)2

=±(x2−y2)

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Answer 2

Answer:

x2-y2 is the mean proportion