(1-1/2)x(1-1/3)x(1-1/4)x(1-1/5)

3 min read Jun 16, 2024
(1-1/2)x(1-1/3)x(1-1/4)x(1-1/5)

Unveiling the Pattern: (1-1/2)x(1-1/3)x(1-1/4)x(1-1/5)

This mathematical expression might seem daunting at first glance, but it hides a simple and elegant pattern. Let's break it down step-by-step:

Simplifying the Expression

Each term in the expression takes the form of (1 - 1/n), where n is a consecutive integer starting from 2. We can simplify each term:

  • (1 - 1/2) = 1/2
  • (1 - 1/3) = 2/3
  • (1 - 1/4) = 3/4
  • (1 - 1/5) = 4/5

Now, our expression becomes: (1/2) x (2/3) x (3/4) x (4/5)

Recognizing the Cancellation

Notice that in the multiplication, many terms cancel out:

  • The '2' in the numerator of the second term cancels with the '2' in the denominator of the first term.
  • The '3' in the numerator of the third term cancels with the '3' in the denominator of the second term.
  • And so on...

This leaves us with just the numerator of the last term and the denominator of the first term: 4/5.

The Solution

Therefore, the value of the expression (1-1/2)x(1-1/3)x(1-1/4)x(1-1/5) is 4/5.

Generalization

This pattern can be generalized for any number of terms. The expression:

(1 - 1/2) x (1 - 1/3) x (1 - 1/4) x ... x (1 - 1/n)

will always simplify to 1/n. This pattern demonstrates a beautiful connection between seemingly complex expressions and simple, elegant results.

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