๐ชๆๆใฎ่ป้ใจ็ก้็ดๆฐใฎ่จ็ฎ
ๅคฉไฝใฎ้ๅใ็ก้็ดๆฐใง่ชฟในใๅ ธๅ็ใชไพใฏใใๆๅ่ซใใซ้ข้ฃใใใใฎใงใใๆๅ่ซใฏใๅคฉไฝใไปใฎๅคฉไฝใฎ้ๅใฎๅฝฑ้ฟใๅใใใใจใงใใใฎ้ๅใใฉใฎใใใซๅคๅใใใใ็ ็ฉถใใๅ้ใงใใ
ไปฅไธใฏใๆๅ่ซใซใใใ็ก้็ดๆฐใฎไฝฟ็จใฎไธไพใ็คบใใใฎใงใ๏ผ
ๆๆใฎ้ๅ: ๆๆใฏๅคช้ฝใฎๅจใใๆฅๅ่ป้ใงๅใใฆใใใจ่ใใใใฆใใพใใใใใใไปใฎๆๆใใใฎ้ๅใฎๅฝฑ้ฟใๅใใใใจใงใๆฅๅ่ป้ใ่ฅๅนฒๆญชใใใจใใใใพใใใใฎๆญชใฟใฏใๆๅใใจใใฆ็ฅใใใฆใใพใใ
ๆๅใฎ่จ็ฎ: ๆๆใฎ้ๅๆน็จๅผใฏใๅๆใฎ่ฟไผผ่งฃ๏ผ้ๅธธใฏใฑใใฉใผใฎๆณๅใซๅบใฅใใใฎ๏ผใๅบใซใใฆใๆๅใฎๅนๆใ่ๆ ฎใใใใใฎไฟฎๆญฃ้ ใๅ ใใใใจใงๅพใใใพใใใใฎไฟฎๆญฃ้ ใฏใไธ่ฌ็ใซ็ก้็ดๆฐใฎๅฝขๅผใง่กจใใใใใจใๅคใใงใใ
็ดๆฐใฎๅๆ: ็ก้็ดๆฐใไฝฟ็จใใฆๆๅใฎๅนๆใ่จ็ฎใใ้ใซใฏใใใฎ็ดๆฐใๅๆใใใใฉใใใ็ขบ่ชใใๅฟ ่ฆใใใใพใใ้ๅธธใๅคฉไฝใฎ้ใฎ่ท้ขใๅคงใใๅ ดๅใๅฝฑ้ฟใๅฐใใๅ ดๅใซใฏใ็ดๆฐใฏ้ใๅๆใใใใจใๆๅพ ใใใพใใ
ไพใใฐใๅฐ็ใฎๅจใใๅใๆใฎ้ๅใฏใๅคช้ฝใฎ้ๅใฎๅฝฑ้ฟใๅใใใใใๆๅ่ซใ็จใใฆ่ฉณ็ดฐใซ่ชฟๆปใใใฆใใพใใใๆใฎ่ป้ใซ้ขใใๆๅ้ ใฏใ็ก้็ดๆฐใ็จใใฆ่จ็ฎใใใใใจใไธ่ฌ็ใงใใ
ๅค้ ๅผๅฑ้ใซ้ข้ฃใใ็ดๆฐๅฑ้ใฎไปฃ่กจ็ใชใใฎใฏไปฅไธใฎใใใชใใฎใงใ๏ผ
ใใคใฉใผๅฑ้ (Taylor series)
ใใฏใญใผใชใณๅฑ้ (Maclaurin series)
ใใฏใฝใณๅฑ้ (Poisson series)
ใฌใธใงใณใใซๅฑ้ (Legendre series)
ใใใใฏใ้ขๆฐใๅค้ ๅผใฎๅฝขใง่ฟไผผใใใใใฎๆนๆณใงใใ
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