What is the explicit formula for this sequence?

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

Write the expression as a single natural logarithm. 2 in a - 4 in y

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17