# Find abc !

Note by Raju Pratama
3 years, 8 months ago

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## Comments

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First off, notice that $$b^{-1} = ac , a^{-1} = bc, c^{-1} = ab$$.

Then,

$$\dfrac{1}{a + b^{-1} + 1} = \dfrac{1}{a + ac + 1}$$

$$\dfrac{1}{b + c^{-1} + 1} = \dfrac{1}{b + ab + 1} = \dfrac{abc}{b + ab + abc} = \dfrac{ac}{1+a+ac}$$

$$\dfrac{1}{c + a^{-1} + 1} = \dfrac{1}{c + bc + 1} = \dfrac{abc}{c+cb + abc} = \dfrac{ab}{1+b+ab} = \dfrac{ab}{abc + b + ab} = \dfrac{a}{1+ a + ac}$$

Add them all up and you'll get the answer.

- 3 years, 8 months ago

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thank's very much for your answer. I didn't think like that before. See you at other question.

- 3 years, 8 months ago

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Well by what time do you want the answer?

- 3 years, 8 months ago

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at 20.45

- 3 years, 8 months ago

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What's time now? ( Your profile suggests that U live in Indonesia)

- 3 years, 8 months ago

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well, maybe you can solve it in 15 minutes

- 3 years, 8 months ago

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20.30

- 3 years, 8 months ago

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My goodness!

- 3 years, 8 months ago

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If U give me sufficient time, I can provide you the complete process by trying myself.

- 3 years, 8 months ago

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Please mention the source of this problem. @Raju Pratama

- 3 years, 8 months ago

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it is my homework from my math course.

- 3 years, 8 months ago

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O! See my inductive process!

- 3 years, 8 months ago

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but I don't get the complete process from you

- 3 years, 8 months ago

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Just put my values of a, b and c in your expression, this is called induction!

- 3 years, 8 months ago

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what induction is?

- 3 years, 8 months ago

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Well, it's kinda technique used to prove mathematical theorems by taking random values, rather than actually proving them by expressions and hard simplifications!

- 3 years, 8 months ago

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This is the worst misconception of Mathematical Induction :/ !

- 3 years, 8 months ago

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Hey, I saw my mistypes! Actually I meant Inductive reasoning! Sorry for that!

- 3 years, 8 months ago

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Ya, No problem. but by the way what the different between Inductive reasoning and Mathematical Induction?

- 3 years, 8 months ago

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Well,... I donno how should I explain, BTW angry on my math teacher, It was he who misconceptualized my brain!

- 3 years, 8 months ago

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Oooh, I'm sorry to hear that.

- 3 years, 8 months ago

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O, I really don't know about it before. Thank's a lot ffor your explaination Karthik Venkata

- 3 years, 8 months ago

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but, do you have a manual way? because my teacher asked me to write the process.

- 3 years, 8 months ago

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Ya, but difficult to edit!

- 3 years, 8 months ago

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if I express 4, 1/4, and 1. I don't get the answer. how about other values?

- 3 years, 8 months ago

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U don't ! Lemme try!

- 3 years, 8 months ago

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how if a = -1, b = -1, and c = 1 ?

- 3 years, 8 months ago

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YA!

- 3 years, 8 months ago

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See Wikipedia on Mathematical Induction. The explanation given by Swapnil is incorrect.

- 3 years, 8 months ago

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how can you get the value of a, b, and c?

- 3 years, 8 months ago

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By random thinking bro! You may take other's too! like 4, 1/4 and 1!

- 3 years, 8 months ago

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please comment.

- 3 years, 8 months ago

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I think the answer is one.

- 3 years, 8 months ago

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how the way?

- 3 years, 8 months ago

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I have not tried, just U try to take the following method I always use, abc=1, then a=??, and go on!

- 3 years, 8 months ago

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What's your age bro?

- 3 years, 8 months ago

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17 years old, how about you?

- 3 years, 8 months ago

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O! I am 14 sir!!

- 3 years, 8 months ago

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@Raju Pratama It's one! I did it by induction! take a =2, b=1/2 and c = 1 !

- 3 years, 8 months ago

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Lol how can it be called induction Swapnil Das ? I think you are confused between Inductive reasoning (guessing) and Mathematical Induction ! See this.

- 3 years, 8 months ago

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Did U get it?

- 3 years, 8 months ago

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no, I don't, but would you like to explain the complete process to me?

- 3 years, 8 months ago

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Think of some numbers a,b,c such that abc=1, I thought and found out! Then put them in the expression!

- 3 years, 8 months ago

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Please replace my induction with inductive reasoning, I was mistakened as my teacher gave me a wrong explanation. Thanks!

- 3 years, 8 months ago

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