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Find the value of x in the expression : $$\root 4 \of {3x + 1} = 2$$
Answer & Solution
Correct Answer:
Option
D
$$\eqalign{
& \root 4 \of {3x + 1} = 2 \cr
& \Rightarrow {\left( {\root 4 \of {3x + 1} } \right)^4} = {2^4} \cr
& \Rightarrow {\left( {3x + 1} \right)^{4 \times \frac{1}{4}}} = 16 \cr
& \Rightarrow 3x = 15 \cr
& \Rightarrow x = 5 \cr} $$
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