Replies

  • Zahra November 10, 2011 22:00

    Thanks dear Sahar for the interesting discussions you provide for us.

    Have a nice time

    :)

    • Sahar > Zahra November 11, 2011 14:26

      You are welcome!

      And thanks for your time, dear.

      You are always good at solving all kinds of puzzles.

  • Zahra November 10, 2011 21:59

    I guess -50 is the answer.

    The even powers of x give zero.

    The odd powers of x give -1.

    Since we have 50 odd terms in the lim, so we have -1*50= -50

    • Sahar > Zahra November 11, 2011 14:24

      Well done!

      It is right exactly.

This reply was deleted.