If the coefficient of xr and xr+1 are equal in the expansion, then r i – McqOptions

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1.	If the coefficient of xr and xr+1 are equal in the expansion, then r is equal to
A.	n
B.	\(\frac{{2{\rm{n}} - 1}}{2}\)
C.	\(\frac{{2{\rm{n}} + 1}}{2}\)
D.	n + 1
Answer» B. \(\frac{{2{\rm{n}} - 1}}{2}\)

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