Let f(x, y)= . Use the Linear Approximation at an appropriate point (a, b) to estimate f(5.04, 1.91) - 歌曲搜索

	01	Sing To The Lord - 《Life Future》 - 何耀珊
	02	Carried to the Table - 《Sound of Melodies》 - Leeland
	03	Clinging To The Cross - 《Holding Nothing Back》 - Tim Hughes My soul is weak My heart is
	04	Joy To The World - 《Top 25 Christmas Songs CD1》 - 圣诞系列 Joy to the world The Lord
	05	Fly To The Moon - 《Healing Rain》 - Michael W. Smith Fly to the moon Well, you c
	06	Straight To The Heart - 《The Second Decade》 - Michael W. Smith
	07	Keys to the Kingdom - 《WOW Hits 2010》 - WOW
	08	Praying to the Wind - 《Something New Under The Sun》 - Adrian Snell
	09	Listen to the Peace - 《Listen To The Peace》 - Adrian Snell
	10	Straight to the Heart - 《I'll Lead You Home》 - Michael W. Smith
	11	Joy to the World - 《Peace on Earth》 - Casting Crowns Joy to the world! The Lord i
	12	Sing To The Father - 《Praise 2 - Open Our Eyes》 - Maranatha! Music
	13	Sing To The Lord - 《Praise 15 - The Praise Series Finale!》 - Maranatha! Music
	14	Hallelujah To The Lamb - 《God for us》 - Don Moen
	15	Shout to The Lord - 《God for us》 - Don Moen
	16	Shout To The Lord - 《God Is Good》 - Don Moen Shout To The Lord My jesu
	17	Glory to the Lord - 《I Will Sing》 - Don Moen Who holds the heavens in his
	18	Say To The Mountain - 《Say To The Mountain》 - 英语诗歌
	19	Come To The Table - 《Say To The Mountain》 - 英语诗歌
	20	Glory To The King - 《The Golden City》 - 英语诗歌