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Beyond Horizon Set 4 Paper 1 · Q9

Paper 1Sequences & seriesPowers & logarithms

Evaluate

∑n=150log⁡1021−n.\sum_{n=1}^{50}\log_{10}2^{1-n}.
A−495log⁡102-495\log_{10}2
B495log⁡102495\log_{10}2
C−1225log⁡102-1225\log_{10}2
D1225log⁡1021225\log_{10}2
E1−495log⁡1021-495\log_{10}2
F1+495log⁡1021+495\log_{10}2
G1−1225log⁡1021-1225\log_{10}2
H1+1225log⁡1021+1225\log_{10}2

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