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Q.

If   m,n ∈N,   limx→0   sinxnsinxm   is

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a

1. if n=m

b

0. if n>m

c

∞. if n

d

nm. if n

answer is A.

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Detailed Solution

L=  limx→0   sinxnsinxm   = limx→0  sinxnxnxnsinxmxmxm=  limx→0  xn-m If  n=m,   then         L  =  a  very   small   value   near  to  zeroexactly  zero=1 If  n>m,  then            L  =  a  very   small   value   near  to  zeropositive   integer=0If  n
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