Try this: substitute your solution back into the first of theOriginally Posted byBanderHM

equations and evaluate the LHS. Does this equal the RHS?

The answer to this last question is no, try it with the answer

from the text book. Now the RHS and LHS agree.

So what do we conclude?

1.Your answer is wrong.

2. The text book could well be right.

To confirm that the textbook is right substitute its solution

into the other two equations and see if they hold.

RonL