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are circumference of concentric circles parallel

What is the sum of the real part and complex part of \(53 + 17\cdot i^{7}\)?

Details and assumptions

\(i \) is the imaginary unit, where \(i^2=-1\).

why water expands on cooling below frezing point

Seriously, I'm looking for some community feedback on the kinds of things they want to learn about in physics/applied math. I'm bored and want to teach people ...

In a triangle ABC of sides 6,7,8 cms.Its incircle intersect it at points D,E,F.find the ratio of ar(DEF)/ar(ABC)

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