Find the positive value of $n$ such that the equation $9x^2+nx+1=0$ has exactly one solution in $x$.
Question:
Find the positive value of $n$ such that the equation $9x^2+nx+1=0$ has exactly one solution in $x$.
Answer:
Let's think step by step.

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Find the positive value of $n$ such that the equation $9x^2+nx+1=0$ has exactly one solution in $x$.
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