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Why should people fly into space?

Today, when many tasks on Earth orbit are performed by robots, and interplanetary flights are fully automatic, many people ask themselves: why send people into space, risking their lives, if automatic stations can do all the work instead?

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Why can’t you divide by zero?

It’s because the four actions of arithmetic-addition, subtraction, multiplication, and division-are actually unequal. Mathematicians recognize only two of them - addition and multiplication - as valid.

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