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I want to start signal processing and I need a book that satisfies my mathematical requirements: I am in the third grade of high school and I don't know any useful thing about limit, differential, ...

Please help me.

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Pun on Grad? $\quad$ – user21436 Feb 29 '12 at 1:16
Are you looking for rigour or a more intuitive understanding of mathematical analysis? If you are looking for a more theoretical approach to analysis, then Apostol's Calculus Vol 1, 2 are probably the best place to start, assuming that as a third grader you have the right background for it. – Rankeya Feb 29 '12 at 1:27
I prefer intuitive understanding one . is it Apostol's Calculus ? – reza Feb 29 '12 at 1:44
The author is in the "third grade of high school", i.e. the OP is probably in the 8 th or 9 th grade of school.I am currently studying calculus from Apostol and I really like his gentle and yet rigorous style. – Eisen Feb 29 '12 at 6:12
@SabyasachiMukherjee When I hear "third grade of high school" I can't think of anything other than 11th grade. – Alex Becker Feb 29 '12 at 7:35
up vote 6 down vote accepted

As I said, for a rigorous and theoretical approach to calculus, Apostol's Calculus Vols. $1$ and $2$ are very good. Depending on your background, for multivariable calculus, Spivak's Calculus on manifolds is also good. Spivak's Calculus (which does single variable calculus) is also one of my favorites.

I think I first learned calculus from Richard Courant's Introduction to Calculus and Analysis. I think Courant's and Robbin's What is Mathematics? also has good intuitive explanations of differentiation and integration.

For a book more intuitive, and perhaps something that a third grader would have background for, try Silvanus Thompson's and Martin Gardner's Calculus Made Easy.

Of course, a book that worked for me might not work for you. I would suggest that you go to a library and browse through a number of different calculus books (there are a lot of them out there), till you find the one that appeals to you the most. If you really are in the third grade, then I would assume there is no real hurry for you to master calculus, and if there is, then the books above are a good place to start.

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That being said, I have no idea about signal processing, so my answer is more based on what good Calculus books there are out there. – Rankeya Feb 29 '12 at 6:01
I want to work on computer signal Processing and image processing . which one is better ? – reza Feb 29 '12 at 14:22

Differential and Integral Calculus, Vol. I [Paperback] Piskunov (Author)

Try this cover to cover and if you finish this you will know more one variable calculus than you will need.

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I think one's first exposure to calculus-no matter how gifted or ambitious the student is-should be a physically and geometrically motivated approach that illustrates most of important applications of calculus. Sadly,many people think that means a "pencil-pushing" or "cookbook" approach where things are done sloppily and with no careful explanation of underlying theory. That's simply not true. You can certainly do calculus non-rigorously while still doing it carefully enough to give students the broad picture of the underlying theory.

The best example of this kind of book,to me, is Gilbert Strang's Calculus. Strang's emphasis is clearly on applications and it has more applications then just about any other calculus text-including many kinds of differential equations in physics(mechanics),chemistry( first and second order kinetics),biology (modeling heart rythum) and economics and a basic introduction to probability.But Strang doesn't avoid a proof when it's called for and the book has many pictures to soften the blows of these careful proofs. This would be my first choice for a high school student just starting out with calculus.

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