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1. |
If the coefficient of \[{{(2r+4)}^{th}}\] and \[{{(r-2)}^{th}}\]terms in the expansion of \[{{(1+x)}^{18}}\]are equal, then r= [MP PET 1997; Pb. CET 2001] |
A. | 12 |
B. | 10 |
C. | 8 |
D. | 6 |
Answer» E. | |