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Q.

Let p=limx0ln(cos2x)3x2,q=limx0sin22xx1-ex and r=limx1xxlnx Then p, e, r satisfy

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a

p<q<r

b

q<r<p

c

p<r<q

d

q<p<r

answer is D.

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Detailed Solution

Clearly,

p=limx0ln(1+cos2x1)3x2=limx0ln(1+cos2x1)(cos2x1)cos2x13x2=23q=limx0sin22x4x24x2x1ex=4and  r=limx1xxln(1+x1)=limx1x(1x)ln1+x1x1(x1)=limx1x(1x)ln1+(x1)x1(x1)(1+x)=12

Hence, q < p < r

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Let p=limx→0 ln(cos2x)3x2,q=limx→0 sin22xx1-ex and r=limx→1 x−xln⁡x Then p, e, r satisfy