ti-84 plus summation is my biggest problem. Can some one assist me understand it? I am a beginner at it. What book or other resource do you suggest for starting this subject?

Algebrator is the latest hot favourite of ti-84 plus summation learners . I know a couple of tutors who actually ask their students to use a copy of this software at their home.

It is good to know that you wish to improve your math and are taking efforts to do so. I think you should try Algebrator. This is not exactly a tutoring software but it provides solutions to math problems in a very descriptive manner. And the best thing about this software product is that it is very user friendly. There are a lot of examples given under various topics which are quite helpful to learn the subject. Try it and wish you good luck with math.

I remember having problems with adding fractions, angle-angle similarity and linear algebra. Algebrator is a truly great piece of math software. I have used it through several algebra classes - College Algebra, Pre Algebra and Pre Algebra. I would simply type in the problem and by clicking on Solve, step by step solution would appear. The program is highly recommended.