# I need to know

#### James Cutler

This one, prove it please, I have 5 problems in linear algebra class as an assignment which I have to hand in next week's Monday and I don't know how to solve this problem, the last one;
$$A^-=\frac{(A_j_k)^T}{det(A)}=\frac{(A_j_k)}{det(A)}$$

Thank you

Related Introductory Physics Homework Help News on Phys.org

#### OlderDan

Homework Helper
James Cutler said:
This one, prove it please, I have 5 problems in linear algebra class as an assignment which I have to hand in next week's Monday and I don't know how to solve this problem, the last one;
$$A^-=\frac{(A_j_k)^T}{det(A)}=\frac{(A_j_k)}{det(A)}$$

Thank you
I don't know about everyone else, but your notation is not clear to me. Is this a matrix equation? Are you talking about an element of a matrix? Did you lose a 1 on the left hand side? Did you mix up the indices somewhere?

### Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving