I dont understand how to solve this can someone help me?

I dont understand how to solve this can someone help me? ATTACHMENT PREVIEW Download attachmentScreenshot (15).png28. The insulation resistance R (in 0/m) of a shielded cable is given by R = k In (2/ri). Here ri and ry are the inner and outer radii of the insulation. Find the expression for dR/dr, if k and r are constant.
 
Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code “Newclient”

What Students Are Saying About Us

.......... Customer ID: 12*** | Rating: ⭐⭐⭐⭐⭐
"Honestly, I was afraid to send my paper to you, but splendidwritings.com proved they are a trustworthy service. My essay was done in less than a day, and I received a brilliant piece. I didn’t even believe it was my essay at first 🙂 Great job, thank you!"

.......... Customer ID: 14***| Rating: ⭐⭐⭐⭐⭐
"The company has some nice prices and good content. I ordered a term paper here and got a very good one. I'll keep ordering from this website."

"Order a Custom Paper on Similar Assignment! No Plagiarism! Enjoy 20% Discount"