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Q.

Let f(x)=limm{esin2xesin2xesin2xesin2x.....esin2xnnnnn} where  n=sec2x  and  given m is the number of radicals in   {esin2xesin2xesin2xesin2x.....esin2xnnnnn} ,
then select INCORRECT alternative(s).
(Consider meaning of radical as  zn=z1n  nR+ )

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a

The number 1 is in the range of function  f(x)  and it is the minimum value of the function

b

The function is unbounded

c

The number e is in the range of the function, and it is the maximum value  of the function.

d

There is only one integer in the range of  f(x)

answer is B, C, D.

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Detailed Solution

 f(x)  Range is  (i,e)
     nLt  esin2x(1n+1n2+........+1nm)     =f(x)
 f(x)=   esin2xcos2x1cos2x=ecos2x

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