A) 8
B) 2
C) 4
D) 3
Correct Answer: D
Solution :
It is given that,\[{{x}^{3}}=9x,x\ne 0,x\ne -3\] Now, \[{{x}^{3}}-9x=0\Rightarrow x({{x}^{2}}-9)=0\] \[\Rightarrow {{x}^{2}}-9=0(\because x\ne 0)\] \[\Rightarrow {{x}^{2}}=9\Rightarrow x=3\] or \[-3\] But \[x\ne -3\therefore x=3\]You need to login to perform this action.
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