S = ∫ 0,5x^2 dx [1;3] = 0,5 ∫ x^2 dx [1;3] = 1/2* 1/3 * x^3 [1;3] =
= 1/6 * ( 3^3-1^3 ) = 1/6 * ( 27 -1 ) = 26/6 = 13/3 ≈ 4,3
ответ
S = 13/3
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S = ∫ 0,5x^2 dx [1;3] = 0,5 ∫ x^2 dx [1;3] = 1/2* 1/3 * x^3 [1;3] =
= 1/6 * ( 3^3-1^3 ) = 1/6 * ( 27 -1 ) = 26/6 = 13/3 ≈ 4,3
ответ
S = 13/3