A) \[30x\]
B) \[12x\]
C) (c)\[15x\]
D) \[20x\]
Correct Answer: C
Solution :
Given, \[1+x+{{x}^{2}}+{{x}^{3}}=60\] then, \[\frac{x+{{x}^{2}}+{{x}^{3}}+{{x}^{4}}}{4}=\frac{x\,\,(1+x+{{x}^{2}}+{{x}^{3}})}{4}\] \[=\frac{60x}{4}=15x\]You need to login to perform this action.
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