If a and b are coefficients of 
in the expansion of 
and 
respectively, then write the relation between a and b.
Given:
Coefficient of 
;k=n
….. (1)
Coefficient of xn;k=n
….. (2)
Divide both equations;
a=2b
1
If a and b are coefficients of in the expansion of and respectively, then write the relation between a and b.
Given:
Coefficient of ;k=n
….. (1)
Coefficient of xn;k=n
….. (2)
Divide both equations;
a=2b