B(n)=1 (-2)^n-1 What is the 4th term in the sequence

Question

B(n)=1 (-2)^n-1
What is the 4th term in the sequence

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Thiên Ân 5 years 2021-08-31T20:22:59+00:00 1 Answers 15 views 0

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  1. giabao
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    2021-08-31T20:24:50+00:00
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    Answer:

    The fourth term of the sequence B(4) =-8

    The sequence is 1,-2,4,-8…

    Step-by-step explanation:

    Explanation:-

    Given that the sequence

         B(n) = 1(-2)ⁿ⁻¹

    Put n=1

        B(1) = 1(-2)¹⁻¹ = 2⁰ =1

    Put n=2

       B(2) = 1(-2)²⁻¹ = (-2)¹ =-2

    Put n=3

      B(3) =1(-2)³⁻¹ = (-2)² =4

    Put n=4

    B(4) = 1(-2)⁴⁻¹ =(-2)³ =-8

    The sequence

    1,-2,4,-8…

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )