Sequence

For each sequence, find a formula for the general term, An 1. {(3/16),(4/25),(5/36),(6/49),...} 2. {(1,2),(1/4),(1/8),(1/16),...}

Given the geometric sequence: 14, (140/11), (1400/121).... Find an explicit formula for An. An= Find A11=    

Find the common ratio and write out the first four terms of the geometric sequence  {(3n-2)/(9)} common ration is? a1= a2= a3= a4=  

For the sequence An= (2)/(3n),   its fifth partial sum S5= its nth partial sum Sn=  

Write the arithmetic sequence 5,10,15,20,.... the standard form: An=

For the arithmetic sequence with given first term 6 and common difference 6: the nth term is? the 10-th term is?  

For the sequence An=3-5*(n-1), the first term is? the second term is? the third term is?  the fourth term is? the fifth term is? the common difference (d) is?  

For the sequence An=2+5*(n-1), the first term is? the second term is? the third term is? the fourth term is? the fifth term is? the common difference (d) is?  

Is the sequence An=4n-6 arithmetic? yes or no? is the answer is yes,  the first term is? the common difference is?

Give a recursive and non-recursive equation for the following sequence:{3,-12,48,-192,...}

In other words:    Pattern 1= 3 line segments (1 triangle) Pattern 2= 9 line segments (4 triangles) Pattern 3= 30 line segments (16 triangles) etc.......

can you help me figure out the formula for this sequence of numbers