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f(x)= sinx-cosx+2^1/2 whole divided by x^3/2 where x belongs to[Π/4,5Π/4].let m the minimum value of f(x) and M be the max value of f(x).then [2M/5m] where [.] denotes greatest integer function

4 years ago


Answers : (1)


Hi Debadutta,


The given expression is

S = [√2*sin(x-Π/4) + √2] / x3/2 = √2 [sin(x-Π/4) + 1] / x3/2


Note that (x-Π/4) ε [0,Π].

So clearly S is maximum when x=Π/4, and minimum when x=5Π/4.


So now you can find what [2M/5m] will be.




4 years ago

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