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What is surd?

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What is surd?

Posted by Snigdha Gupta 4 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Meghna Thapar 4 years, 5 months ago

Surds are numbers left in 'square root form' (or 'cube root form' etc). They are therefore irrational numbers. The reason we leave them as surds is because in decimal form they would go on forever and so this is a very clumsy way of writing them. Surds originated from the Latin word surdus which meant "mute". This muted sound is largely thought that it represents irrational numbers whereas rational numbers would be a pure, clear sound.

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