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 and are the first two terms in a geometric seqeunce

2.1 Show that the third term is

2.2 Calculate the value of 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