The book Infinitesimals And Limits was written by author Joseph Johnston Hardy Here you can read free online of Infinitesimals And Limits book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Infinitesimals And Limits a good or bad book?
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[i] Hence ^I< I X ' e. < I X ' ^3< I X ' etc < etc. , ^«< I X ' Cj €, €3 ....
€„< I x„ INFINITESIMAI. S AND LIMITS 1 3 Now making x increase indefinitely we can make — an infinitesimal. Hence by [i] c^ f..^ S • • • ^n is an infin- itesimal. Q. E. D. PROPOSITION 5 14. First. — A power of an infinitesimal is itself an infinitesimal if its exp orient is a positive finite other than o.
Second. — // is an infinite if its exponent is a negative finite other than o.
Third. — // is equal to i if its exponent is o.
First.
Let a be any infinitesimal and p a positive finite other than o.
[i] Then a^ = a a a a ... To / factors.
[2] But a a a ... To / factors is an infinitesi- mal, by § 13.
[3] Hence a^ ^^ an infinitesimal.
Second. Let — / be a negative finite other than o.
[4] Then ''~'=^' But since a is an infinitesimal [5] a^ = an infinitesimal, by case i.
by § 10.
[6] and I = an infinite.
Hence by [4] we get [7] a^ — an Third.
infinite.
Let P = 0.
Then a. ' .
= a« = = I.
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