## Is this solution right or not ??? Need yr backing

Hello guys,

would you please check the solution attached with this post and whether it's right or wrong ???
if wrong, what's the correct solution

I'm looking forward to get yr backing ASAP
Attached Thumbnails

 PhysOrg.com science news on PhysOrg.com >> Intel's Haswell to extend battery life, set for Taipei launch>> Galaxies fed by funnels of fuel>> The better to see you with: Scientists build record-setting metamaterial flat lens
 Hey Mechano and welcome to the forums. Looks good to me with the chain rule and proper substitution but its been a while since I've done any vector calculus or line integrals, but based on the identities, the chain rule and the substitution looks good. Hopefully we can get a few more clarifications here just to be sure.
 I'm grateful your quick response Chiro, I"m agree with you, let's waiting the other clarification to be sure of solution's validity

## Is this solution right or not ??? Need yr backing

for the same problem above, can you help me to suggest solution to find

$\oint$gdf
 would you please check the attachment, I solved above question and I need your approval Attached Thumbnails