Question

已知函數(shù)，則          .

Answer 1

解析試題分析：∵，∴
考點(diǎn)：本題考查了分段函數(shù)求值
點(diǎn)評(píng)：解決分段函數(shù)的求值問(wèn)題的關(guān)鍵是弄清自變量所在的范圍。