Basic27.py

# Write a Python program to find the type of the progression (arithmetic progression/geometric progression) and the next successive member of the three successive members of a sequence.
def ap_gp_sequencer(arr):
    if arr[0]==arr[1]==arr[2]==0:
        return "Wrong Numbers"
    else:
        if arr[1]-arr[0]==arr[2]-arr[1]:
            n=2*arr[2]-arr[1]
            return "AP sequence, "+'Next number of the sequence : '+str(n)
        else:
            n=arr[2]**2/arr[1]
            return "GP sequence, "+'Next number of the sequence : '+str(n)
print(ap_gp_sequencer([1,2,3]))
print(ap_gp_sequencer([2,6,18]))
print(ap_gp_sequencer([0,0,0]))