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(1 + 2x + 3x² + 4x³ + ....)?² = a? + a?x + a?x² + ...a?x?. Then |a? - a?| = ______.

0 2 Views | Posted 3 weeks ago
Asked by Shiksha User

  • 1 Answer

  • R

    Answered by

    Raj Pandey | Contributor-Level 9

    3 weeks ago

    1 + 2 x + 3 x 2 + 4 x 3 … = ( 1 - x ) - 2

    1 + 2 x + 3 x 2 + 4 x 3 … - 2 = ( 1 - x ) 4 = 1 - 4 x + 6 x 2 - 4 x 3 + x 4

    a 0 = 1 , a 1 = - 4

      a 0 - a 1 = 5

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