Anku posted an Question
September 11, 2020 • 21:39 pm 30 points
  • IIT JAM
  • Mathematics (MA)

Please exxplain encircled part...i am not understanding how (-1)(-1) is comming

please exxplain encircled part...i am not understanding how (-1)(-1) is comming

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    Piyush pachauri best-answer

    PFA.

    cropped2144318461127575179.jpg
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    Hope you get it.

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    sir why this was done..i mean what was need to make it (-1)(-1) hai

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    I have attached one more image.

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    please see that we have to prove 41 divides 2^20-1

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    sir please help here

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    (-9)^2 =81 it is -1 mod 41

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    sir but here mod 41 is there in question so why to take mod 82...

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    sir are u applying any property

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    pls tell sir

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    okk sir i got it

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    thanku sir

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    Sorry , I made a mistake while writing it was 41 not 82.

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