HuaYongLi
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I've recently come across a http://technologyinterface.nmsu.edu/Spring08/" for why power is maximised in a component when its resistance R_L equals the internal resistance R.
But in part (5) of method 1, we need to find the minimum non-negative value that the expression k+k^-^1 can take. For this they use the inequality (k-1)^2 \geq 0 and then expand it to k^2-2k+1 \geq 0 which is then in turn divided by k and rearranged to get k+k^-^1 \geq 2
The problem I have grasping is the part where they come up with the inequality to solve this problem. This is a step I have never come across, and I was wondering if this method had a name.
Thanks
But in part (5) of method 1, we need to find the minimum non-negative value that the expression k+k^-^1 can take. For this they use the inequality (k-1)^2 \geq 0 and then expand it to k^2-2k+1 \geq 0 which is then in turn divided by k and rearranged to get k+k^-^1 \geq 2
The problem I have grasping is the part where they come up with the inequality to solve this problem. This is a step I have never come across, and I was wondering if this method had a name.
Thanks
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