解 易见函数[tex=7.571x1.286]wCq0ZRNznhQ0s2rIX4b9xSsWXIynQPPcMcPRXhsrtGs=[/tex]，从而可积。为便于计算，将[tex=1.929x1.286]vPlUmwL8t1REs9r1XOy2kg==[/tex]分为[tex=0.643x1.286]ZsZs11iKEvfmzDIurZth8g==[/tex]等分，则[tex=7.143x2.0]58uuEG0lJPyW1La2kfHw8YoBafZKhu8WXzK2fQiAmAzJM/+6wZrADChr+rVSnrK+[/tex]。于是[tex=7.143x1.286]eCRYo3woMgu0Wygjvoj6AS4qfxP7sTGPT9PNXq76wt0OZd/Rwo4zbj/P7rrj2V4d5IDohMzEUKIzRH9OVnyLnw==[/tex]；取每个小区间的左端点为[tex=0.5x1.286]cFLrzlMvECfU5CTqcvierw==[/tex]，[tex=6.429x2.0]QXrFedcwkbFiQ196pKbqD3SNqswMwIXm0BqyKdT2gzLWNCMICgXHU8vrN4roQYKD[/tex]，[tex=7.429x1.286]KTXxK3Rj391L1JGJZGkj28PftSUsp18x5sYT9qnkN90=[/tex] [tex=27.214x2.857]H7rWDdc8V6OmldHxdiGe1yPYtG3NqT6ZJ7pfCOz3UnKgFberKcBlQhw9q9o4x8TpPyc5gDkrol9GnycvYVjb+1pBloi7ghroL/9gfa2k/09Jvy6EEW8m+1uXyVd+Npdly/2sOP3QJ837XNoQib3iDS0HkTHqpeFMP9Bc408lK1yGW/2FKdsWC0dGBmImDjsTPNG4f/j7xH2C+K4MwF7FNbl26AvAjLh3hXbEohds/MKD8v/lKp01WHjMS9++yEsM38WidBbk0ECVyyl0C+PUnuXZEpLTB3AHtVrKKU1CLzs=[/tex][tex=24.571x2.357]UmjF8nv72vBj8hajRPThjR94yX/L7d+dxWPQlrpX6x1YwtBA3oEeA2w2Bl6C1E+4e7VAaXtF/uLRyBbvS8EXBTcd5EChnpmIZO58lDH8q02s2ImzsBdOg5nUqQFduM3HvapU5Rp7hcmvdhBvi7YFQM67pglLegN3BwrxT1tPYl0=[/tex][tex=16.429x2.357]UmjF8nv72vBj8hajRPThjR94yX/L7d+dxWPQlrpX6x0iCzE/zu5zrHdvz2qBLB+vVdGAFLOAfpn1wNIWhDCT19fb7kOn6oGxetBWawMH/rWE0bN38r2/Xt29HZtAN3egIZSdmUWXjjQsKa7vu7sRCQ==[/tex][tex=15.714x2.357]UmjF8nv72vBj8hajRPThjR94yX/L7d+dxWPQlrpX6x0iCzE/zu5zrHdvz2qBLB+v5TzjDdFvTPpsCoGvwWJhQqsSjq3fKRZV3fILwv5zj+3A5POceLxRK6MonjdLq24wRNc590vro2iI1QbH4lH2aw==[/tex][tex=15.5x2.357]vr7rFNH6srlQdKQ82Vsg2vfW1l/X3uS3UvahgtR7FiFSyHJyOONDSvkkTU5h8Qf8pTtOnJSeBZAGlBoa40QzBuue9xocNRCE0YaulTgxOdw=[/tex]。