Kvadratrötter

Description

Mathematics (Ma3b) Flashcards on Kvadratrötter, created by Joacim Jonsson on 01/12/2017.
Joacim Jonsson
Flashcards by Joacim Jonsson, updated more than 1 year ago
Joacim Jonsson
Created by Joacim Jonsson almost 7 years ago
15
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Resource summary

Question Answer
Definiera kvadratroten ur 3: \(\sqrt{3}\) Det tal som gånger sig självt blir 3: \(\sqrt{3}\approx 1.73\) \(1.73\cdot1.73=3\)
Vad är \(\sqrt{25}\)? \(\sqrt{25}=5\) (EJ -5)
Lös \(x^2=25\) \(x=\pm5\)
Vad är \(-\sqrt{16}\) \(-\sqrt{16}=-4\)
Vad är \(\sqrt{-9}\) \(\sqrt{-9}\) är inget reellt tal
Vad är \(\sqrt{5}\) i potensform? \(\sqrt{5}=5^{\frac{1}{2}}\)
\(\sqrt{2}\cdot\sqrt{3}=\) \(\sqrt{2}\cdot\sqrt{3}=\sqrt{2\cdot3}\) \(\sqrt{a}\cdot\sqrt{b}=\sqrt{a\cdot b}\) \((a,b\geq0)\)
\(\frac{\sqrt{5}}{\sqrt{2}}=\) \(\frac{\sqrt{5}}{\sqrt{2}}=\sqrt{\frac{5}{2}}\) \(\frac{\sqrt{a}}{\sqrt{b}}=\sqrt{\frac{a}{b}}\)
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