2 years ago

Can someone help pls 20 points

Mathematics

2 answers:

bazaltina [42]2 years ago

7 0

Answer:

all of them except the very last one

Step-by-step explanation:

i had the same one

MatroZZZ [7]2 years ago

3 0

Answer:

A,B,D

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Considering the sequence

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A geometric sequence has a constant ratio r and is defined by

$g_n=g_0\cdot r^{n-1}$

$\mathrm{Compute\:the\:ratios\:of\:all\:the\:adjacent\:terms}:\quad \:r=\frac{g_{n+1}}{g_n}$

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$\mathrm{The\:ratio\:of\:all\:the\:adjacent\:terms\:is\:the\:same\:and\:equal\:to}$

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$g_1=-5$

$r=5$

$g_n=g_1\cdot r^{n-1}$

$\mathrm{Therefore,\:the\:}n\mathrm{th\:term\:is\:computed\:by}\:$

$g_n=-5\cdot \:5^{n-1}$

Therefore, Li Jing's formula i.e. $\boxed{g_n=-5\cdot \:5^{n-1}}$ is right.

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