Need some help with these plz x/

1) The 10th term of an arithmetic sequence is 30 and the sum of the first six terms is 3. Calculate the first three terms of the sequence.

2) The expressions $\displaystyle m^2 - 4 $ and $\displaystyle m + 2 $ are the first two terms in a geometric seqeunce

2.1 Show that the third term is $\displaystyle \frac{m+2}{m-2} $

2.2 Calculate the value of $\displaystyle m $ of the sequnce is [math \frac{1}{2} [/tex]

2.3 Write down the numeric values of the 1st three terms of the seqeunce

Thanks alot