1-show that 1-x/2 is the tangent line approximation to 1/ sqrt of 1+x near x=0
2-what is the local linearization of e^x^2 near x=1
3-find the tnagent line approximation of 1/x near x=1
2-what is the local linearization of e^x^2 near x=1
3-find the tnagent line approximation of 1/x near x=1