medium · GMAT Quant
Solar cell efficiency improvements across 3 initial production batches k = 1, 2, 3 are given by e_k = dfrac1k(k+3).
What is the sum E = sum_k=1^3 e_k?
- dfrac73180
- dfrac7360
- dfrac37180
- dfrac1118
- dfrac18073
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