kebojr1234 kebojr1234

20-07-2020
Mathematics

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Write an explicit formula for An, the nth term of the sequence 1, -2, 4, ....

Respuesta :

mathstudent55 mathstudent55

20-07-2020

Answer:

an = (-2)^(n - 1)

Step-by-step explanation:

a1 = 1

a2 = 1 * (-2) = -2

a3 = a2 * (-2) = (-2) * (-2) = (-2)^2

a4 = a3 * (-2) = (-2)^3

etc.

an = (-2)^(n - 1)

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