Mathematics: Find the first, fourth, and eighth terms of the sequence. a(n) = −2 ∙ 2x − 1

Find the first, fourth, and eighth terms of the

Ответ:

soevse

11.03.2022

$A(n)=-2\cdot2^{n-1}\\\\\text{Find the first, fourth, and eighth terms}\\\text{It means}\ A(1),\ A(4)\ \text{and}\ A(8).\\\\\text{Substitute}\ n=1,\ n=4\ \text{and}\ n=8\ \text{in}\ A(n):\\\\A(1)=-2\cdot2^{1-1}=-2\cdot2^0=-2\cdot1=-2\\\\A(4)=-2\cdot2^{4-1}=-2\cdot2^3=-2\cdot8=-16\\\\A(8)=-2\cdot2^{8-1}=-2\cdot2^7=-2\cdot128=-256\\\\\boxed{\ -2,\ -16,\ -256}$

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KayleighMorganhopkin

23.05.2020

Mathematics

how is this a question?

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Find the first, fourth, and eighth terms of the sequence. a(n) = −2 ∙ 2x − 1

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