Birch-Murnaghani võrrandi lähenduse tuletamine

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Vaatleme võrrandit:

[math] E(V) = E_0 + \frac{9 V_0 B_0 }{16} \left\{ \left[ \left(\frac{V_0}{V}\right)^{\frac{2}{3}} -1 \right]^3 B_0^' + \left[ \left( \frac{V_0}{V}\right)^{\frac{2}{3}} -1 \right]^2 \left[ 6 - 4 \left( \frac{V_0}{V} \right)^{\frac{2}{3}} \right] \right\} \;\; (1) [/math]

Gruppeerides võrrandis (1) liikmed <maht> \frac{V_0}{V}</math> astmete järgi saame järgmise võrrandi:

[math] E(V) = a + b \cdot (\frac{V_0}{V})^2 + c \cdot (\frac{V_0}{V})^\frac{4}{3} + d \cdot (\frac{V_0}{V})^\frac{2}{3}[/math]