Getal & Ruimte (12e editie) - vwo wiskunde B
'Wortels vereenvoudigen'.
| 2 vwo | 5.3 Wortels herleiden |
opgave 1Herleid. 2p a \(\sqrt{48} + \sqrt{75}\) Optellen (5) 0085 - Wortels vereenvoudigen - basis - 0ms a \(\sqrt{48} + \sqrt{75} = \sqrt{16} ⋅ \sqrt{3} + \sqrt{25} ⋅ \sqrt{3} = 4 \sqrt{3} + 5 \sqrt{3} \text{.}\) 1p ○ \(4 \sqrt{3} + 5 \sqrt{3} = 9 \sqrt{3} \text{.}\) 1p 1p b \(\sqrt{50}\) FactorVoorWortelteken (1) 0086 - Wortels vereenvoudigen - basis - 0ms b \(\sqrt{50} = \sqrt{25} ⋅ \sqrt{2} = 5 \sqrt{2} \text{.}\) 1p 1p c \(6 \sqrt{48}\) FactorVoorWortelteken (2) 0087 - Wortels vereenvoudigen - basis - 0ms c \(6 \sqrt{48} = 6 ⋅ \sqrt{16} ⋅ \sqrt{3} = 6 ⋅ 4 ⋅ \sqrt{3} = 24 \sqrt{3} \text{.}\) 1p 2p d \(7 \sqrt{50} - 4 \sqrt{200}\) Optellen (6) 0088 - Wortels vereenvoudigen - basis - 0ms d \(7 \sqrt{50} - 4 \sqrt{200} = 7 ⋅ \sqrt{25} ⋅ \sqrt{2} - 4 ⋅ \sqrt{100} ⋅ \sqrt{2} \text{.}\) 1p ○ \(7 ⋅ 5 ⋅ \sqrt{2} - 4 ⋅ 10 ⋅ \sqrt{2} = 35 \sqrt{2} - 40 \sqrt{2} = -5 \sqrt{2} \text{.}\) 1p opgave 2Herleid. 1p \(\sqrt{1\frac{11}{25}}\) BreukInWortel (1) 008b - Wortels vereenvoudigen - basis - 31ms ○ \(\sqrt{1\frac{11}{25}} = \sqrt{\frac{36}{25}} = {\sqrt{36} \over \sqrt{25}} = \frac{6}{5} = 1\frac{1}{5} \text{.}\) 1p |
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| 3 vwo | 5.5 Wortels herleiden |
opgave 1Herleid. 1p a \({7 \over 3 \sqrt{7}}\) WortelInNoemer 0089 - Wortels vereenvoudigen - basis - 0ms a \({7 \over 3 \sqrt{7}} = {7 \over 3 \sqrt{7}} ⋅ {\sqrt{7} \over \sqrt{7}} = {7 \sqrt{7} \over 3 ⋅ 7} = \frac{1}{3} \sqrt{7} \text{.}\) 1p 1p b \(\sqrt{\frac{11}{64}}\) BreukInWortel (2) 008c - Wortels vereenvoudigen - basis - 1ms b \(\sqrt{\frac{11}{64}} = {\sqrt{11} \over \sqrt{64}} = {\sqrt{11} \over 8} = \frac{1}{8} \sqrt{11} \text{.}\) 1p 1p c \(\sqrt{\frac{1}{12}}\) BreukInWortel (3) 008d - Wortels vereenvoudigen - basis - 0ms c \(\sqrt{\frac{1}{12}} = {\sqrt{1} \over \sqrt{12}} = {1 \over \sqrt{12}} ⋅ {\sqrt{12} \over \sqrt{12}} = {\sqrt{12} \over 12} = \frac{1}{12} \sqrt{12} = \frac{1}{12} ⋅ 2 ⋅ \sqrt{3} = \frac{1}{6} \sqrt{3} \text{.}\) 1p 1p d \(\sqrt{10\frac{1}{3}}\) BreukInWortel (4) 008e - Wortels vereenvoudigen - basis - 0ms d \(\sqrt{10\frac{1}{3}} = \sqrt{\frac{31}{3}} = {\sqrt{31} \over \sqrt{3}} ⋅ {\sqrt{3} \over \sqrt{3}} = {\sqrt{93} \over 3} = \frac{1}{3} \sqrt{93} \text{.}\) 1p opgave 2Herleid. 1p a \({36 \sqrt{60} \over 4 \sqrt{3}}\) Delen (4) 00dc - Wortels vereenvoudigen - basis - 1ms a \({36 \sqrt{60} \over 4 \sqrt{3}} = {36 \over 4} ⋅ {\sqrt{60} \over \sqrt{3}} = 9 \sqrt{20} = 9 ⋅ \sqrt{4} ⋅ \sqrt{5} = 9 ⋅ 2 ⋅ \sqrt{5} = 18 \sqrt{5}\) 1p 1p b \(3 \sqrt{7} ⋅ 5 \sqrt{14}\) Vermenigvuldigen (5) 00dd - Wortels vereenvoudigen - basis - 2ms - data pool: #22 (2ms) b \(3 \sqrt{7} ⋅ 5 \sqrt{14} = 15 \sqrt{98} = 15 ⋅ \sqrt{49} ⋅ \sqrt{2} = 15 ⋅ 7 ⋅ \sqrt{2} = 105 \sqrt{2}\) 1p |