CHALLENGE: THE SUM OF THE SECOND & THIRD TERM IN AGEOMETRIC SERIES IS 45. THE SUM OF THE FOURTH & FIFTHTERM IS 20. FIND THE GEOMETRIC SEQUENCE:
The 4th and 5th terms add to 20
The 2nd and 3rd terms add to 45
Factor out any common factors
In each equation
Use the common ratio to find the first term
Find the 2nd series when thecommon ratio is negative