∫sin(2x+1)dx=?· ∫1/(1+x^2)dx=
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∫sin(2x+1)dx=?·∫1/(1+x^2)dx=∫sin(2x+1)dx=?·∫1/(1+x^2)dx=∫sin(2x+1)dx=?·∫1/(1+x^2)dx=∫sin(2x+1)dx=-1/
∫sin(2x+1)dx=?· ∫1/(1+x^2)dx=
∫sin(2x+1)dx=?· ∫1/(1+x^2)dx=
∫sin(2x+1)dx=?· ∫1/(1+x^2)dx=
∫sin(2x+1)dx=-1/2cos(2x+1)+C
∫1/(1+x^2)dx=arctanx+C
详细过程见插图
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