√(8-X^2)=2√2*√[1-(√2x/4)^2]∴ʃ√(8-X^2)dx=8ʃ√[1-(√2x/4)^2]d(√2x/4)=8arcsin(√2x/4)+C即√(8-X^2)的原函数为8arcsin(√2x/4)+C
没懂什么意思
