Logarithm Basics Part IV

Algebra Level 4

$\large \color{blue}{\log_3(9^x+9)=x+\log_3(28-2 \cdot 3^x)}$

If $$a_1,a_2,...a_n$$ are the real roots of the above equation, then find the value of $\dfrac{a_1+a_2+...+a_n}{n}$

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