Jony3345 Jony3345 30-05-2023 Mathematics contestada If the 5th term of a geometric progression (GP) is 6.25 and the 7th term is 1.5625, determine the 1st term, and the common ratio. Select one: O a. a₁ = 10, r=0.5 O b. a₁ = -100, r = 0.5 Oca₁ = 100, r = ±0.5 O d. a₁ = 100, r = ±0.25