Is this sequence geometric -8,-5,-1,4...

If c1 = -1 and  c2 = 4 and r=3

then we can plug in values  as numerators    

          c1 x c2 . r^b                   c1 x c2 . r^b

= Sb     then      wont be required.

             1 -r                                1/1-r

Where r represents 3 and r can stay 3 it is a geometrical sequence. As c3 value would be unique and so would c4. c5 c6 etc. it is only r and the answer to the first equation each time that keeps it geometric.

Step-by-step explanation:

one fourth of 9% = 2.25%

gavin is correct in saying : the equivalent quarterly interest rate would be

2.25%.