Conclusion
Any arithmetic progression is completely determined by any two its quantities.A progression is another way of saying sequence, thus a Geometric Progression is also known as a Geometric Sequence.A Geometric Progression is a special sequence
defined by the special property that the ratio of two consecutive terms is the same for all the terms in the sequence. Whereas in Arithmetic Progression we talked of difference, here we talk of ratios meaning
that when you divide the current term by the previous term the number that you get should be a non zero constant that is the same for all the consecutive pairs of terms in the sequence andAharmonic progression (or harmonic sequence) is a progression formed by taking the reciprocals of an arithmetic progression.