Can Rows be Combined Without Type III Operations?

CuppoJava
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Homework Statement


Show that any multiple of a row can be added to a row above it by row operations of other types.

Homework Equations


There are only 3 elementary row operations.
i. Interchange two rows
ii. Multiply a row by a constant
iii. Add a multiple of a row to another row.

The Attempt at a Solution


I don't think it is possible and would like to confirm this. Without using type iii operations, there is no method of combining two rows.

Thanks for your help
-Patrick
 
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You mean can i) and ii) be combined to show iii)? Doesn't seem likely, does it?
 
No it seems quite impossible. I'm glad my mathematical intuition isn't completely failing me yet. Thanks Dick!
-Patrick
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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