From an AP Calculus BC exam guide book:

Use Euler's method with step incrementh=0.1to approximatey(0.3), wherey(x)is the solution to the IVPy'=y+xy,y(0)=1.

We think the answer is (C)1.37. The answer key says the answer is (E)1.54. I think the book gave the answer fory(0.4). Are we right? Is the book?

PS. Answers A,B, and D are:1.221,0.1, and1.1.

Edit:OK, some more detail:

Isn't ?