A) \[2{{x}^{3}}+3{{x}^{2}}+x+1\]
B) \[2{{x}^{3}}+{{x}^{2}}+x-1\]
C) \[2{{x}^{3}}-{{x}^{2}}+x-1\]
D) \[-{{x}^{2}}+x-1\]
Correct Answer: C
Solution :
\[(1-x)\,\,(1+{{x}^{2}})=1-x+{{x}^{2}}-{{x}^{3}}\] So, \[\]must added to \[\left( 1-x+{{x}^{2}}-{{x}^{3}} \right)\] to obtain \[{{x}^{3}}\].You need to login to perform this action.
You will be redirected in
3 sec