Question

the rationalizing factor of 1 /50​

Answer 1

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1/50 is already rational number.

It doesnt need any rationalising number.

Rationalising number are used for those rationals which dont have simple fraction like

$\frac{1}{ \sqrt{3} }$

Here denominator is in root.

Thus your answer will not have any rationalising factor

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Answer 2

It shoud be 1/√50..

anyway,

= (1×√50)/(√50×√50)

{multiplying Numerator and denominator by √50}

= √50/50

Therefore √50 is the rationalizing factor since there is no root in the denominator.