If the coefficients of \[{{r}^{th}}\]term and \[{{(r+4)}^{th}}\]term are equal in the expansion of \[{{(1+x)}^{20}}\], then the value of r will be [RPET 1985, 97; Kerala (Engg.) 2001; MP PET 2002]

If the coefficients of \[{{r}^{th}}\]term and \[{{(r+4)}^{th}}\]term

1.	If the coefficients of \[{{r}^{th}}\]term and \[{{(r+4)}^{th}}\]term are equal in the expansion of \[{{(1+x)}^{20}}\], then the value of r will be [RPET 1985, 97; Kerala (Engg.) 2001; MP PET 2002]
A.	7
B.	8
C.	9
D.	10
Answer» D. 10

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If the coefficients of \[{{r}^{th}}\]term and \[{{(r+4)}^{th}}\]term are equal in the expansion of \[{{(1+x)}^{20}}\], then the value of r will be [RPET 1985, 97; Kerala (Engg.) 2001; MP PET 2002]

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