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Rzqust [24]
3 years ago
10

There are infinitely How many pairs of numbers of which the sum of their cube roots is zero give two of these pairs

Mathematics
1 answer:
ivanzaharov [21]3 years ago
8 0

Answer:

Infinite pairs of numbers

1 and -1

8 and -8

Step-by-step explanation:

Let x³ and y³ be any two real numbers. If the sum of their cube roots is zero, then the following must be true:

\sqrt[3]{x^3}+ \sqrt[3]{y^3}=0\\ \sqrt[3]{x^3}=- \sqrt[3]{y^3}\\x=-y

Therefore, any pair of numbers with same absolute value but different signs fit the description, which means that there are infinite pairs of possible numbers.

Examples: 1 and -1; 8 and -8; 27 and -27.

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How many solutions does this equation have x^4 - 6x^2 -7 = 0
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Answer:

2 solutions

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x^4-6x^2-7=0

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2 roots

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