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anonymous
 one year ago
@robtobey A geometric sequence is obtained by placing five terms between 10 and 640. What is the common ratio equal to ?
anonymous
 one year ago
@robtobey A geometric sequence is obtained by placing five terms between 10 and 640. What is the common ratio equal to ?

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jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2If r is the common ratio, then what is the next term right after 10?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0nothing the question was just like this

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2do you agree that it would be 10*r or 10r ?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2since to get the next term, you multiply the last term by r hopefully that makes sense

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0nope mate the answer will be 4 2 3 5 or 6

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2don't worry about the answer choices right now

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2idk what you mean the term that comes after 10 is 10r the term after 10r is 10r*r = 10r^2 etc etc until you get to 640

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2you should get this sequence: 10, 10r, 10r^2, 10r^3, 10r^4, 10r^5, 640

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2the next term after 10r^5 is 10r^6 therefore, 10r^6 = 640

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2solve 10r^6 = 640 for r to get your answer

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.0I agree, to see an example look at 1,2,4,8,16,32,64 64/1=2^6

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2r = 4 is false

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2r = 2 is true

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thanks man can I ask 1 more question

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thank you then now I am writing

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1439165401472:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Did you get the question because my drawing is not good enough ?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2what is the area of the circle given

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2hint: use A = pi*r^2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0it has given no area

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2use that formula I gave to compute the area

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2r = 5 in this case

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2A = pi*r^2 A = pi*5^2 A = ???

anonymous
 one year ago
Best ResponseYou've already chosen the best response.025pi then wat will happen

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2now we will have another circle with the same center at point A this new circle will have radius 3 dw:1439165882115:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2the goal is to find the area of this shaded region and divide it by the 25pi found earlier dw:1439165892979:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2what is the area of the smaller circle?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0but the answer is not 9/25 mate

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2it would be 9pi/25pi = 9/25 IF we wanted to land inside the inner circle but we want to land in that ring I shaded above

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2area of ring = (area of larger circle)  (area of smaller circle)

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2answer = (area of ring)/(area of larger circle)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yes which will be 16/25

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can I ask more please

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0if you can all of them :D

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2are you able to compute f ' (x) ?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2dw:1439166519002:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2what is the derivative of sin(x) ?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2so we just derive the outer function sin(...) to get cos(...) dw:1439166578842:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2then we use the chain rule to derive cos(x) to get sin(x) so derive cos(...) to get sin(...) that gets multiplied to what we have dw:1439166647000:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2we then go in further derive 5x to get 5 that gets tacked on too dw:1439166679192:dw I placed it up front

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2so \[\Large f \ ' (x) = 5\cos(\cos(5x))*(\sin(5x))\]

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2now just replace every x with pi/10 and evaluate

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the answer I think will be 5

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can I PLease PLease ask one more question

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0just one more and thats it

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0did you find the answer mate

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Recall that \(sec^2(x)  tan^2(x) =1 \) \(cos^2(x)  cos(x)sin(x) = cos^2(x)[1  tanx] = \frac{1}{sec^2(x)}[1tanx] = \frac{1}{1+tan^2(x)}[1tan(x)]\) Now put the value of tan(x) that's given.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0* \(\frac{1}{1+tan^2(x)}[1tan(x)]\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeah but thats not my answer

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Substitute the tan(x)= 2 and get the answer.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0wat you think will be the answer
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