A geometric proof that for 0<r<1, (1-r) + (1-r)r + (1-r)r² + ... = 1, and therefore that 1 + r + r² + ... = 1/(1 - r)pic.twitter.com/r22dM7PoUM
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Please, I'd be very interested to see it
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Here's a starting point, showing how things go for r = 1/2:pic.twitter.com/asbc1ROJM6
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