according to ques,
concentric circles with centre
![\[\left( 1,\text{ }2 \right)\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-ca90d766a9c864b025f5f9b4732009fd_l3.png "Rendered by QuickLaTeX.com")
and with radius ‘r’ can be written as,
![\[{{\left( x\text{ }\text{ }1 \right)}^{2}}~+\text{ }{{\left( y\text{ }\text{ }2 \right)}^{2}}~=\text{ }{{r}^{2}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-e149848fb047f8eddad32928357bad01_l3.png "Rendered by QuickLaTeX.com")
Differentiating with respect to x,
We have,
according to ques,
concentric circles with centre
and with radius ‘r’ can be written as,
Differentiating with respect to x,
We have,
