Page 231 - 1300 Math Formulas
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CHAPTER 8. DIFFERENTIAL CALCULUS
8.7 Differential
=
cìåÅíáçåëW=ÑI=ìI=î=
fåÇÉéÉåÇÉåí=î~êá~ÄäÉW=ñ=
aÉêáî~íáîÉ=çÑ=~=ÑìåÅíáçåW= ( ) ñó′ I= ( ) ñ =
Ñ′
oÉ~ä=Åçåëí~åíW=`=
aáÑÑÉêÉåíá~ä=çÑ=ÑìåÅíáçå= ó = Ñ ( ) ñ W=Çó=
aáÑÑÉêÉåíá~ä=çÑ=ñW=Çñ=
pã~ää=ÅÜ~åÖÉ=áå=ñW= ñ∆ =
pã~ää=ÅÜ~åÖÉ=áå=óW= ó∆ =
=
=
838. Çó = ó′ Çñ =
=
)
839. ( Ñ + )ñ ∆ Ñ ( ñ = ñ + Ñ′ ( ) ññ ∆ =
=
=
=
Figure 178.
221
