rehamalnumi07 rehamalnumi07

14-02-2022
Mathematics

contestada

Which is the equation for the nth term of the geometric sequence: -4,8,-16...?

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evgeniylevi evgeniylevi

14-02-2022

Answer:

aₙ=(-2)ⁿ*2.

Step-by-step explanation:

1) -4*(-2)=8; 8*(-2)=-16; -16*(-2)=32, ...

2) the required equation is:

aₙ=(-1)ⁿ*2ⁿ*2; ⇒ aₙ=(-2)ⁿ*2 or aₙ=(-1)ⁿ*2ⁿ⁺¹.

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