Find the value of x in the expression : $$\root 4 \of {3x + 1} = 2$$
A. 3
B. 6
C. 4
D. 5
Answer: Option D
Solution (By Examveda Team)
$$\eqalign{ & \root 4 \of {3x + 1} = 2 \cr & \Rightarrow {\left( {\root 4 \of {3x + 1} } \right)^4} = {2^4} \cr & \Rightarrow {\left( {3x + 1} \right)^{4 \times \frac{1}{4}}} = 16 \cr & \Rightarrow 3x = 15 \cr & \Rightarrow x = 5 \cr} $$This Question Belongs to Arithmetic Ability >> Surds And Indices
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