Geometric sequence or progression

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I just used this to learn real quick so I could explain it to a Japanese friend of mine.
Thank you for keeping it simple

swivel_z
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7*49= 7*50-7*1 far more easy then 7*40+7*9

The next one is 343*7 = 49*49 = (50-1)^2=50^2-2*50+1=2401

ronkedoor
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I was just learning this in math class it's easy

RydinTheBlaze
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who is watching because a code problem used GP?

digitalnomad