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James Chen TMUA Paper 1 · Q9

Paper 1Sequences & series

Evaluate ∑r=0∞(310r+110r+1+410r+2)\displaystyle\sum_{r=0}^{\infty}\left(\frac3{10^r}+\frac1{10^{r+1}}+\frac4{10^{r+2}}\right).

A3.143.14
B3.140.9\dfrac{3.14}{0.9}
C31.431.4
D3.149\dfrac{3.14}{9}
E3.140.09\dfrac{3.14}{0.09}
F0.93.14\dfrac{0.9}{3.14}
G3.141.1\dfrac{3.14}{1.1}
H1.13.14\dfrac{1.1}{3.14}

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