∫−20(4−t2)dt\int_{-2}^0\left(\sqrt{4-t^2}\right)dt∫−20(4−t2)dt
16+2⋅3616+2\cdot3616+2⋅36
x2+12x=6x^2+12x=6x2+12x=6
1ce−(−x+b)+ne(−ax+b)\frac{1}{ce^{-\left(-x+b\right)}+ne^{\left(-ax+b\right)}}ce−(−x+b)+ne(−ax+b)1
2⋅25a2⋅4b22\cdot\sqrt{25a^2}\cdot\sqrt{4b^2}2⋅25a2⋅4b2
625−50+25+1625-50+25+1625−50+25+1
x2=20x^2=20x2=20
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