 And if any three quantities, a, b, c, (2,4, 6,) be in arithmetical proportion, the double of the mean is equal to the sum of the extremes, r . THEOREM 2.  Cockers Arithmetick, perused by J. Hawkins - Σελίδα 87των Edward Cocker - 1736Πλήρης προβολή - Σχετικά με αυτό το βιβλίο
 | John Hill - 1716 - 496 σελίδες
...l.xtreams г and 6. . ; i ,. TH JE О Ц. EM Ш. ' If Four Numbers are in Arithmetical Pregrejfim, tbi Sum of the two Means is equal to the Sum of the two Er treams. .,' 807,11,15, 19, are Four Numbers in Arithmetical Progreffion, and the Sum of the... | |
 | Nicolas Pike - 1808 - 470 σελίδες
...PROPORTION. THEOREM 1. IF any four quantities a, b, c, it, (2, 4, 6, 8) be in arithmetical proportion,* the sum of the two means is equal to the sum of the two extremes.f And if any three quantities, a, b, c, (2,4, 6,) be in arithmetical proportion, the double... | |
 | Thomas Simpson - 1821 - 426 σελίδες
...Arithmetical Proportion. THEOREM I. Of any four quantities, a, b, c, d, in arithmetical progression,* the sum of the two means is equal to the sum of the two extremes. For since, by supposition, b — a is = d — c, therefore is 6 -fc = d + a, by transposition.... | |
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...to 16. THEOREM 1. If any four quantities, a, b, c, d, (2, 4, 6, 8,) be in arithmetical proportion, the sum of the two means, is equal to the sum of the' two extremes. And if any three quantities, a, b, c, (2, 4, 6,) be in arithmetical proportion, the double... | |
 | Nicolas Pike - 1832 - 538 σελίδες
...ARITHMETICAL PROPORTION. THEOREM F. IF any four quantities 2, 4, 6, 8 be in arithmetical proportion,* . lio sum of the two means is equal to the sum of the two extremes.! And if any three quantities, 2, 4, 6, be in arithmetical proportion, the double of the... | |
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