A community for students.
Here's the question you clicked on:
 0 viewing
Tabbiejack
 2 years ago
Write the explicit formula for the geometric sequence.
a1 = 5 a2 = 20 a3 = 80
A. an = 5 • (4)n
B. an = 5(4)n1
C. an = 4(5)n1
D. an = 5 • (4)n
Tabbiejack
 2 years ago
Write the explicit formula for the geometric sequence. a1 = 5 a2 = 20 a3 = 80 A. an = 5 • (4)n B. an = 5(4)n1 C. an = 4(5)n1 D. an = 5 • (4)n

This Question is Closed

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1look a1 = 5 n=1 a2=20 n=2, etc..

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2It would be B because in a geometric sequence, you have \[\large ar ^{n1}\] and in finding our r, we take \(\large\frac{ a _{2} }{ a _{1} }\) and that is 4

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1This way you can eliminate A because term 2 doesn't match up... And I think Jhanny's right

Tabbiejack
 2 years ago
Best ResponseYou've already chosen the best response.0thanks you that was heard

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2So we have a1 = 5, our r = 4 and plug it into our formula \[\large ar ^{n1}\]

Tabbiejack
 2 years ago
Best ResponseYou've already chosen the best response.0Can you help me with another

Tabbiejack
 2 years ago
Best ResponseYou've already chosen the best response.0What is the simplified form of the expression?dw:1369539526178:dw

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2Alright, for this one you have a variable with two different powers dividing eachother, and in this case, we can simply do this. \[\large \frac{ 1 }{ q ^{\color{red}{(33/4)8} }}\]

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2we you know to solve \[\color{fuchsia}{\frac{ 33 }{ 4 }}\color{green}{8}\]

Tabbiejack
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1369539985575:dw

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2hmm...something seems wrong here.

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2\[\frac{ 33 }{ 4 }8*(\frac{ \color{green}{4} }{ \color{green}{4} })= \frac{ 33 }{ 4 }\frac{ \color{darkorchid}{32} }{ \color{darkorchid}{4} }\]

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2Ohh I see. hm, well what do you get when you reduce 33/4 32/4? :D

Tabbiejack
 2 years ago
Best ResponseYou've already chosen the best response.0I have no Idea what the answer is

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2solve (33/4)(32/4) and we'll work from there, you'; get your answer, promise :)

Tabbiejack
 2 years ago
Best ResponseYou've already chosen the best response.0I am the parent of 2 children that is failing

Tabbiejack
 2 years ago
Best ResponseYou've already chosen the best response.0this looks like greek to me..

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2ok, what is.... 32?

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2good :) so 3332 works the same way, it is also 1.

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2So we now have \[\frac{ 1 }{ q ^{\color{blue}{1/4}} }\]

Tabbiejack
 2 years ago
Best ResponseYou've already chosen the best response.0algebra has always been my worst subject

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2It'll get better with practice :) Practice makes people perfect in math ^_^

Tabbiejack
 2 years ago
Best ResponseYou've already chosen the best response.0I remember hearing that when I was young

Tabbiejack
 2 years ago
Best ResponseYou've already chosen the best response.0I have another quesiton if you are up to it?

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2Of course :) Math is a lot about understanding a problem as a whole and finding a relation to a technique method in solving, it's all patterns.

Tabbiejack
 2 years ago
Best ResponseYou've already chosen the best response.0I have 2 test to give to my children for the summer to help them prepare for summer school that is why I am getting the answers so I will be able to help them

Tabbiejack
 2 years ago
Best ResponseYou've already chosen the best response.0What is the simplified form of the expression?dw:1369541274406:dw

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2\[\large (3x ^{\color{forestgreen}{7/2}})^{\color{blue}{6}}(x ^{\color{green}{2}})^{\color{blue}{6}}\] here, we will start 1 part at a time. lets start with \(\large (3x ^{7/2})^{6}\)

Tabbiejack
 2 years ago
Best ResponseYou've already chosen the best response.0ok what do we do next

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2we're going to multiply 6 to the 3 AND the x^(7/2)

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2Are you able to do that?

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2Hm.. not exactly, we have \[\large(3^{\color{blue}{6}})(x ^{\color{blue}{(7/2)(6)}})\] which gives us \[\large(729x ^{21})\]

Tabbiejack
 2 years ago
Best ResponseYou've already chosen the best response.0A. 729x33 B. 3x33 C. 729x29 D. 3x29

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2Now that we've taken care of the first part, we can move onto the second part, which is \[\large (x ^{2})^{6} = x ^{\color{red}{6*2}}= x ^{\color{blue}{12}}\]

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2Now we can combine both parts together so we get \[\large (729x {^\color{green}{21}}) *(x ^{\color{green}{12}}) = 729x ^{\color{red}{21+12}}\]

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2And adding 21 + 12 for the exponent, you'll get your answer. i've done the rest

Jhannybean
 2 years ago
Best ResponseYou've already chosen the best response.2Good luck with your other problems!
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.