Questions related to "math"
Q : if f:R--->R such that f(x)f(y) – f(xy) = x+ y where x,y belongs to R . find f(0) where f(0) is not equal to zero and hence find f(7)

### Anjulika, Gold Medalist in B.Sc., IIT Kanpur Alumini , PhD. Maths, 4+ years experience with BE students

Put x=0 and y=0 in the given equation. Get [f(0)]^2-f(0)=0 or f(0) [f(0) -1] =0, now since f(0) !=0, f(0) = 1. now put x=0 and y=7, to get f(7) = 8. ... (read more)
Q : if f:Z---->Z such that f(0)=1 & f(f (n) ) = f( f( n+2) +2) = n for all n belongs to Z . find f(2).
Can any one please suggest me the best book for mathematics for IIT JEE?
HOW TO FIND RANGE AND GIVE SOME EXAMPLES
Looking for general guidance for my daughter, who will be starting her IIT preparation.

### Anjulika, Gold Medalist in B.Sc., IIT Kanpur Alumini , PhD. Maths, 4+ years experience with BE students

I can suggest about preparing maths for IIT. Preparing for maths does not means learning couple of formulaes and apply them. The basic concept should be very clear which means knowing how we got that formula so that if some tricky changes in the problem has been done, student is easily able to tackle it. Student should take topic one by one and start from the base, do not just pick books with heavy questions and start with them. Knowing a topic perfectly has three step: (1) know the basic (2) practice with simple problems (3) go on practicing with all kind of problems which fantasize you. A... (read more)
I am going to give IIT JEE in 2016 how should I improve in Maths?

### Abhishek Gupta, Physics tutor for IIT JEE with more than 15 years experience and having produced ranks 26, 83, 133, 198, 298, 483 and many more.....

Do lots of practice and solve previous years papers of JEE MAINS and ADVANCED. ... (read more)
What are the key topics to revise in the last months for the IIT JEE (Mains) test?
For cracking IIT JEE Mains what we have to do?