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6 September, 19:25

Write 1/5 + (1/5) ^2 + (1/5) ^3 + (1/5) ^4 as a decimal

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  1. 6 September, 19:37
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    1/5 + (1/5) ² + (1/5) ³ + (1/5) ⁴ = 1*2 / (2*5) + (1*2/2*5) ² + (1*2/2*5) ³ + (1*2/2*5) ⁴ =

    = 2/10+4/100+8/1000+16/10000 = 0.2 + 0.04+0.008 + 0.0016=

    =0.2496
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