Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**iLloyd054****Member**- Registered: 2014-04-01
- Posts: 10

1. 3x3 matrix question.

2, s, t

Determine the value of 3s+t when A= 2, 0, s+t is a symmetric matrix.

3, 3, t

*Last edited by iLloyd054 (2014-04-02 01:00:24)*

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 90,607

Hi iLloyd054;

Have you copied the problem correctly?

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

Offline

**iLloyd054****Member**- Registered: 2014-04-01
- Posts: 10

ooh! my bad

1. 3x3 matrix question.

2, s, t

Determine the value of 3s+t when A= 2s, 0, s+t is a symmetric matrix.

3, 3, t

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 90,607

This is the way I see your matrix A.

We have t = 3 and s = 0

so 3s + t = 3

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

Offline