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Easpónant

Ón Vicipéid, an chiclipéid shaor.

Nodaireacht sa mhatamaitic a shimplíonn scríobh iolrach. Mar shampla, is féidir 5 × 5 × 5 × 5 a scríobh mar 54, agus is é 4 an t-easpónant (nó an séan) sa chás seo. Is féidir an nodaireacht seo a úsáid i gcás easpónant codánach, diúltach is eile. Nuair a scríobhtar uimhreacha sa bhfoirm seo, mar shampla: 625 = 54, tá dlíthe ar leith na séan is féidir a chur i bhfeidhm orthu, mar seo: ya × yb = ya+b, ya/yb = ya-b, (ya)b = yab, y0 = 1, y-a = 1/ya.[1]

  1. Hussey, Matt (2011). "Easpónant". Fréamh an Eolais. Coiscéim. p. 239.
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