Mathematics: Correct answer only ! enter the explicit rule for the geometric sequence. 120, 40, 40/3, 40/9, 40/27,

Correct answer only ! enter the explicit rule for

Ответ:

TheCampingStone

10.03.2022

$\bold{a_n=120\bigg(\dfrac{1}{3}\bigg)^{n-1}}$

Step-by-step explanation:

$\text{A geometric sequence is represented by:}\ a_n = a_1 (r)^{n-1}\\\text{where}\ a_1\ \text{is the first term, r is the common ratio, and n is the term}$

$\text{In the given sequence,}\ a_1=120\ \text{and r} = \dfrac{40}{120}=\dfrac{1}{3}$

$\rightarrow \ a_n=120\bigg(\dfrac{1}{3}\bigg)^{n-1}$

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Ответ:

wgdelgado

08.01.2021

Mathematics

£70.00

Step-by-step explanation:

You basically want to find what she spent in total, then subtract the amount she spent on ingredients.

50 glasses of lemonade at £2.10 each would be £105. (50*2.1)

Subtract the cost of ingredients, which is £35, with the total she made, £105, to get £70 (105-35)

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Correct answer only ! enter the explicit rule for the geometric sequence. 120, 40, 40/3, 40/9, 40/27,

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