ForsideBøgerPocketbook of Useful Form…and Mechanical Engineers

Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

Forfatter: Guilford L. Molesworth

Sider: 744

UDK: 600 (093)

Søgning i bogen

Den bedste måde at søge i bogen er ved at downloade PDF'en og søge i den.

Derved får du fremhævet ordene visuelt direkte på billedet af siden.

Download PDF

Digitaliseret bog

Bogens tekst er maskinlæst, så der kan være en del fejl og mangler.

Side af 764 Forrige Næste
613 OF ENGINEERING FOKMULÆ. Arithmetical and Geometrical Progression A = First term. x — Any term whose number is n fiom A. n = Number of terms between A and x. S = Sum of all the terms. D = Difference between the terms. R = Ratio by which the terms are to be multi- plied or divided. ARITHMETICAL PROGRESSION. 2 S A = x — D (n — 1) ----------- <£• n x = A + D (n — ’ 1) = — A. n S = in (A + x~). GEOMETRICAL X x = AR'1’1 R - - PROGRESSION. = S - R (8 - X). S — A = b--R— • B,x — A b =-- R - 1