Mathematics, 25.05.2020 11:57 favre22fs

I need help understanding what happened to the 2 in the numerator of the highlighted part of the problem in the screen grab please. Why not say 3^k+6^k/2? Thank you.

I need help understanding what happened to the 2 in the numerator of the highlighted part of the pr

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I need help understanding what happened to the 2 in the numerator of the highlighted part of the pro...