[微積] ∫ 1/((x^2+r^2)^(3/2))dx
如題,
1
∫ --------------------dx
(x^2+r^r)^(3/2)
我用變數代換跟三角函數都不知道怎麼算.....
請強者指點迷津~
到底u要設成什麼比較好呢
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