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    Please help me with these (basic stuff)

    Hello guys! I need your immense help! Please help:

    1) What is the 11th root of 2 in Z19?

    2) How many elements are there in Z*35? (35 is wrong answer)

    3) What is the discrete log of 5 base 2 in Z13? (i.e. what is Dlog2(5))

    4) Solve the equation x^2 + 4x + 1=0 in Z23
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    Whoever is paying your tuition, it is a terrible waste of money for you to take a university course without learning anything.

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