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Geometric Series First Term
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Geometric Series First Term


Instruction on how to use the calculator to solve the above problem

Step 1. Enter 2 in box n2 Why? It is the second number in geometric series.

Step 2. Enter 0.3 decimal equivalent of 3/10 the recorded value for second number

Step 3. Enter 6 in box n6 Why? It is the six number in geometric series.

Step 4. Enter 1.51875 decimal equivalent of 243/160 the recorded value for the sixth number.

Then select the Solve button if needed. Usually the answer is automatic.

Step 5. The answer is letter a = the first term of geometric series

Step 6. Now you can predict the last number at any position of the geometric series. How ? Enter any integer number in box n nth to compute the expected value of the Last term, L nth term
For example n nth = 9
L nth = 5.1258

Step 7. Total number of geometric series up to the last number term or last position is calculated automatically.

How to become a millionaire in 37 days, application of geometric series


Given information you have $0.20 dollar in day 1, $0.30 in day 2, $0.45 in day 3, $0.675 in day 4. Your business is growing and your income grows geometrically or exponentially at constant rate of 1.5 from previous day. What will be your money in day 12, in day 24, in day 48 and in day 50? As you can see it is possible to become a millionaire in 37 days.

The hardest part is finding and sustaining a business that grows exponentially at a rate of 1.5 per day.

Here is my work in progress demonstration on how to achieve $1 million dollar in 37 days. I am still solving the hardest part finding a solution to old problem that students or teachers or parents willing to pay for my online service.

My idea is to solve the learning loss or forgetting problem of every student by offering $1.70 per month online subscription to never forget subscription for reviewer, formula, and calculator.

Creating the demand or need for my service is the hardest part because if nobody is willing to pay for the online subscription service that I am offering then there no is geometric series at a constant rate of 1.5 per day. The next challenge is to cover the overhead expenses to automate the online registration, online payment, online content delivery, and online subscription renewal or cancellation.

I believe using geometric series principle it is possible for me to become a millionaire in 37 days even if my company is a one man online subscription company.

Days Savings Money Accumulated Savings Subscription $1.70 per Month Qty Sold Per Day Total $ Subscription Accumulated $ Sales
Day 1 $0.20 - - - -
Day 2 $0.30 $0.50 - - -
Day 3 $0.45 $0.95 - - -
Day 4 $0.68 $1.63 1 $1.70 $1.70
Day 5 $1.01 $2.64 1 $1.70 $3.40
Day 6 $1.52 $4.16 1 $1.70 $5.10
Day 7 $2.28 $6.44 1 $1.70 $6.80
Day 8 $3.42 $9.86 1 $1.70 $8.50
Day 9 $5.13 $14.99 3 $5.10 $13.60
Day 10 $7.69 $22.68 6 $10.20 $23.80
Day 11 $11.53 $34.21 6 $10.20 $34.00
Day 12 $17.30 $51.50 10 must be sold by automation $17.00 $51.00
Day 13 $25.95 $77.46 15 must be sold by automation $25.50 $76.50
Day 14 $38.92 $116.38 22 must be sold by automation $37.40 $113.90
Day 15 $58.39 $174.77 36 must be sold by automation $61.20 $174.10
I will get the savings $87.58 from subscription
Day 16 $87.58 $262.35 52 must be sold by automation $88.40 $262.50
I will get the savings $131.37 from subscription
Day 17 $131.37 $393.72 78 must be sold by automation $132.60 $395.10
I will get the savings $197.05 from subscription
Day 18 $197.05 $590.77 115 must be sold by automation $195.50 $590.60
I will get the savings $295.59 from subscription
Day 19 $295.59 $886.36 174 must be sold by automation $295.80 $886.40
I will get the savings $443.70 from subscription
Day 20 $443.37 $1,329.73 261 must be sold by automation $443.70 $1,330.10
Day 21 $665.05 $1,994.78 391 must be sold by automation $664.70 $1,994.80
Day 22 $997.58 $2,992.33 587 must be sold by automation $997.90 $2,992.70
Day 23 $1,496.37 $4,488.70 880 must be sold by automation $1,496 $4,488.70
Day 24 $2,244.55 $6,733.24 1,320 must be sold by automation $2,244 $6,732.70
Day 25 $3,366.82 $10,100.07 1,981 must be sold by automation $3,367.7 $10,100.40
Day 26 $5,050.23 $15,150.30 2,971 must be sold by automation $5,050.70 $15,151.10
Day 27 $7,575.35 $22,725.65 4,456 must be sold by automation $7,575.20 $22,726.30
Day 28 $11,363.03 $34,088.68 6,684 must be sold by automation $11,362.80 $34,089.10
Day 29 $17,044.54 $51,133.22 10,026 must be sold by automation $17,044.20 $51,133.30
Day 30 $25,566.81 $76,700.02 15,040 must be sold by automation $25,568 $76,701.30
Day 31 $38,350.21 $115,050.24 22,559 must be sold by automation $38,350.30 $115,051.60
Day 32 $57,525.32 $172,575.55 33,838 must be sold by automation $57,524.60 $172,576.20
Day 33 $86,287.98 $258,863.53 50,758 must be sold by automation $86,288.60 $258,864.80
Day 34 $129,431.96 $388,295.49 76,136 must be sold by automation $129,431.20 $388,296
Day 35 $194,147.95 $582,443.44 114,205 must be sold by automation $194,148.50 $582,444.50
Day 36 $291,221.92 $873,665.36 171,307 must be sold by automation $291,221.90 $873,666.40
Day 37 $436,832.88 $1,310,498.25 256,961 must be sold by automation $436,833.70 $1,310,500.10

Example problem using geometric series on how to become a millionaire in 37 days.

a =
r =

n2 = is the second term or day 2, given information.
L2 = is the money value at 2nd term or day two, given information.
a = Answer, first term or first day initial money
n37th day =
L37th = Value at 37th term or Day 37

compute the value at n12th = 12
value is 17.2995
at n24th = 24
value is 2,244.5483
at n48th = 48
value is 37,784,977.7905
at n50th = 50
value is 85,016,200.0285

n3rd day =
3 for 3rd day, given information.
L3 =
L3 = 0.45 value of money on 3rd day, given information.
r = automatic computation of ratio.


Total of geometric series at 37th term = Answer


The Graph of Geometric Function
y = a r n-1

Notice the equation is similar to the Last Term equation Ln = a r n-1
Here a = first term of the series = 0.20 ;
r = geometric ratio = 1.5
And n = number of series is represented by the x-axis
While L = last term value is represented by the y-axis.


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