Question

3√3/4π * (пR^2-3√3R^2/4)/пr^2
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Answer 1

(3√3)/(4п)*(пR^2-3√3(R^2)/(4))/(пR^2) = (3√3)/(4п)*(4п-3√3)/(4п) = (12√3 п-27)/(16п^2)