[∫f(x)dx]=()A、<img src="/lqwvjeImg/d3/d3c15907bbb417554b42fae9411d87cd.png" width="36" height="22" alt="" style="" /><span style="font-size:10.5pt;font-family:宋体;">； </span> B、<img width="62" height="22" alt="" src="/lqwvjeImg/f2/f272435dca55ad3bea19d41d29bd0b0d.png" /> C、<img width="52" height="22" alt="" src="/lqwvjeImg/59/59baabb034c2614be9e20c3c7d51af38.png" />； D、<img src="/lqwvjeImg/f2/f2b6b87be8c6731b0584e0c14aabbcb2.png" width="36" height="22" alt="" style="" />