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Argument and modulus of frac{{1 + i}}{{1 - i}} are respectively ...
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1) Is work done by a force only when force and displacement are parallel to each other? 2) A man is lifting a body vertically upward? What are the forces acting on the body? What is the sign of work done by these forces? ...
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Why is the value of log-3-27 ≠3? Because... log-3-27 = log-3(-3 * 9)=log-3-3 + log-39 = 1 + 2 = 3 ...
