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Usha Rani Dash Grade: 11
        
Find the coefficient of x101 in the expansion 1 + (1+x) + (1+x)+ ------------------- + (1+x)2011
one year ago

Answers : (1)

moumi roy
78 Points
										
series is in gp.so there sum can fetch us the result.\sum 1+\left ( 1+x\right )+\left ( 1+x\right )^{2}.....+\left ( 1+x\right )^{2011}\Rightarrow 1*[\frac{(1+x)^{2012}-1}{x}]\Rightarrow \frac{(1+x)^{2012}}{x}-\frac{1}{x}
coifficient of x102 is needed of the first part _{102}^{2012}\textrm{c}.hope this is the needed answer
one year ago
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