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Question

I : Number of partial fractions of x3+x2+1x4+x2+1 is 4
II : Number of partial fractions of 3x+5(x−1)2(x2+1)3 is 5

Which of the above statement is true.

A
only I
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B
Only II
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C
Both I and II
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D
Neither I nor II
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Solution

The correct option is B Only II

statement 1 is false.
x3+x2+1x4+x2+1=x3+x2+1(x2+x+1)(x2x+1)
=Ax+B(x2+x+1)+Cx+D(x2x+1) so two partial fractions.
3x+5(x1)2(x2+1)3=A(x1)+B(x1)2+Cx+D(x2+1)
+Ex+F(x2+1)2+Gx+H(x2+1)3
So,5 partial fraction
So II correct


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