Solving Binomial Theorem Qs: If nC0 + nC1 + nC2...+ nCn = 256

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In summary, the conversation discusses a question about finding the value of n in the equation nC0 + nC1 + nC2 +...+ nCn = 256. The conversation goes on to mention using the binomial theorem and the importance of understanding the question of "What is 1+1?" After some confusion and trial and error, the value of n is determined to be 8.
  • #1
angel_eyez
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i an havign trouble solving this qs

if nC0 + nC1 + nC2 +...+ nCn = 256 find the value of n

all help appreciated:smile:
 
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  • #2
You know the binomial theorem, so what values of x and y have the expansion of (x+y)^n equal to that sum?
 
  • #3
i don't get it, i know that teh values of x and y shoudl be one, but if it is equal to 256 how can i put that ?
 
  • #4
Right, so what does n have to be for (1+1)^n to equal 256?
 
  • #5
Do you understand that the crucial question here is "What is 1+ 1?":smile:
 
  • #6
its a series question . i forgot how to do it..sorry.
 
  • #7
cool i solved it lol. took less than 5 mins tried and error on calc.. there is a proper way to solve it... well n=8 i work it out by put numbers into n@_@ yeh 8 is correct value.omfg I am sorry guys it oready been solve... by (1+1)^n=256 <--- how did dat work out@_@ well i did tried my best@_@
 
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  • #8
Excuse me? 'Trial and error'? The whole question was "for what n does n does 2n= 256. How long does that take to calculate?
22= 4, 23= 8, 24= 16, 25= 32, 26= 64, 27= 128, 28= 256. Well, gosh, I guess n= 8 so that 2n=256!
 
  • #9
thnx...i get it now
 

FAQ: Solving Binomial Theorem Qs: If nC0 + nC1 + nC2...+ nCn = 256

What is the Binomial Theorem?

The Binomial Theorem is a mathematical formula that allows you to expand binomial expressions, which are expressions with two terms, raised to a power. It is written as (a+b)^n, where a and b are constants and n is a non-negative integer. The expanded form of this expression is the sum of all possible combinations of the terms a and b raised to different powers.

How do you solve for the coefficients in the Binomial Theorem?

The coefficients in the Binomial Theorem can be found by using the formula nCr = n! / r!(n-r)!, where n is the power of the binomial expression and r is the power of the term you are trying to find the coefficient for.

What does the equation nC0 + nC1 + nC2...+ nCn = 256 represent?

This equation represents the sum of all the coefficients in the expansion of a binomial expression with n terms. In other words, it represents the total number of terms in the expansion of (a+b)^n.

How do you find the value of n in the equation nC0 + nC1 + nC2...+ nCn = 256?

To find the value of n, you can use the formula nC0 + nC1 + nC2...+ nCn = 2^n. This means that the value of n must be the power of 2 that is closest to 256. In this case, n = 8, since 2^8 = 256.

How can the Binomial Theorem be applied in real life situations?

The Binomial Theorem can be applied in various real life situations, such as in probability and statistics, where it is used to calculate the number of possible outcomes in a given scenario. It can also be used in finance and investment calculations, as well as in physics and engineering problems involving binomial expansions.

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