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jawab

[tex] \int\limits^2_1 \int\limits^x_0 {xy^3} \, dy\, dx [/tex]

[tex] \int\limits^2_1 [ \frac{x}{4}\, y^{4} \,]^{x}_0\, dx= [/tex]

[tex]\int\limits^2_1 \frac{1}{4}\, x^{5}\, dx= \, \frac{1}{4}. \frac{1}{6}[x^{6}]^{2}_1\,=\, \frac{1}{24} [2^{6}-1]\,= \frac{63}{24}\,= \, 2,625[/tex]