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| rev | Admin | (Created page with "'''Solution: C''' <math display = "block"> \begin{array}{l} {{\mathrm{Int}_{11} = i \cdot [ 900 \cdot a_{\overline{20}|i} + 300a_{\overline{10}|i}] =900(1-{ v}^{20})+300(1-{ v}^{10})=1200-300{ v}^{10}-900{ v}^{20}}} \\ {{\displaystyle{\mathrm{Int}_{21}=i\left[900\cdot a_{\overline{{{10}}}|i}\right]=900(1- v^{{\mathrm{i0}}})}}}\\ {{\displaystyle{\mathrm{Int}_{11=}2\mathrm{Int}_{21}\displaystyle\Rightarrow1200-300 v^{{\mathrm{i0}}}-900 v^{{\mathrm{i0}}}=1800-1800 v^{{\ma...") | Nov 18'23 at 23:56 | +620 |