If in a progression \( a_{1}, a_{2}, a_{3}, \ldots \). etc., \( \left(a_{r}-a_{r+1}\right) \) be... VIDEO
If in a progression \( a_{1}, a_{2}, a_{3}, \ldots \). etc., \( \left(a_{r}-a_{r+1}\right) \) bears a constant ratio with \( a_{r} \cdot a_{r+1} \), then the terms of the progression are inhttps://bit.ly/YTAI_PWAP https://www.pw.live
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