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

You are not logged in.

## #1 2013-05-28 04:41:06

mom
Member
Registered: 2012-04-25
Posts: 94

### Find the entry in the second row, first column of AB

Please let me know if I did this correctly.

I have Let A = [1 4] and B = [3 -2]. find the entry in the second row, first column of AB.
2 3                4  6

I multiplied A and B to get AB and the number I got for the second row, first column of AB was 18. Did I do this correctly?

Offline

## #2 2013-05-28 05:25:57

bob bundy
Registered: 2010-06-20
Posts: 8,108

### Re: Find the entry in the second row, first column of AB

That looks good to me.

Bob

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

Offline

## #3 2013-05-28 05:47:58

mom
Member
Registered: 2012-04-25
Posts: 94

### Re: Find the entry in the second row, first column of AB

Bob,

nice! thanks so much for checking it for me.

Offline