Need to do this ASAP please

Answer this question, only if you know the answer. 30 points and brainliest!

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex