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Varvara68 [4.7K]
3 years ago
10

The sum of a rational number and an irrational number?

Mathematics
1 answer:
Semenov [28]3 years ago
3 0

Answer:

Is irrational

Step-by-step explanation:

Let r be a rational number, and i be an irrational number. If their sum were rational, say q, then we'd have

r+i=q \iff i=q-r

but q-r is the difference between two rational numbers, and thus a rational number. But it also equals i, which is irrational by hypothesis. Since we have a contradiction, we conclude that the sum of a rational and an irrational can't be rational.

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21+15

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3 years ago
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Susan needs to walk a total distance of 1/2 of a mile. She has walked 1/8 of a mile so far. How much further does she have to go? Simplify the fraction if possible.

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