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I, n, d, and. S; any three of which being given, the other two may be found, by combining the two equations. I shall leave the learner to trace these ' himself as occasion may require. Examples in Progression by Difference.
An Introduction to Algebra: Upon the Inductive Method of Instruction - Σελίδα 232
των Warren Colburn - 1837 - 276 σελίδες
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