2nd question answer please
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The answer is c)2ab/a+b.
dee0123:
how?
Its given in my Maths Text book
page number bro
or sister
Pg no:126.
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I think option (c) is correct
The harmonic mean between a and b is
H = 2/(1/a+1/b)
On proceeding it will be equal to
H = 2ab/(a+b)
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