Search found 26 matches
- by rattan123
Wed Nov 14, 2012 2:14 am- Forum: Problem Solving
- Topic: Algebra, please help.
- Replies: 5
- Views: 1278
squares
Values of n for which n^4-n^2+64 is a square.
I've got values of 0,1,-1,8,-8 by trial and error.Is there a method to solve this.!!!
- by rattan123
Thu Aug 30, 2012 8:34 am- Forum: Problem Solving
- Topic: squares
- Replies: 2
- Views: 957
- by rattan123
Wed Aug 15, 2012 10:12 pm- Forum: Problem Solving
- Topic: divisibility of integers
- Replies: 5
- Views: 1106
- by rattan123
Wed Aug 15, 2012 6:29 pm- Forum: Problem Solving
- Topic: divisibility of integers
- Replies: 5
- Views: 1106
divisibility of integers
show that any integer divisible by 3 can be written as a sum of of cubes of 4 integers.(example 6=2^3+ (-1)^3 + (-1)^3 +0^3 )
- by rattan123
Wed Aug 15, 2012 8:42 am- Forum: Problem Solving
- Topic: divisibility of integers
- Replies: 5
- Views: 1106
- by rattan123
Wed Aug 15, 2012 2:01 am- Forum: Problem Solving
- Topic: prime
- Replies: 1
- Views: 768
factorization
. Find all integer values of a such that the quadratic expression
(x + a)(x + 1991) + 1
can be factored as a product (x + b)(x + c) where b and c are integers.
- by rattan123
Thu Aug 09, 2012 10:01 pm- Forum: Problem Solving
- Topic: factorization
- Replies: 2
- Views: 850
- by rattan123
Thu Aug 09, 2012 9:33 am- Forum: Problem Solving
- Topic: prime factorization
- Replies: 1
- Views: 2837
Sorry a
change in the question
2^a + 3^b = 17
2^a+b -3^b+1 = 5
Find the value of a and b.
The answer is correct..!!
- by rattan123
Wed Jul 18, 2012 1:16 am- Forum: Problem Solving
- Topic: equation
- Replies: 8
- Views: 1410
- by rattan123
Tue Jul 17, 2012 8:48 am- Forum: Problem Solving
- Topic: equation
- Replies: 8
- Views: 1410
simple..!!! just use wavy curve.!!!!!
15x-2/x-1>0
(15x^2-x-2)/x >0
(3x+1)(5x-2)/x >0
Using Wavy curve we get.!!(http://www.askiitians.com/forums/Differ ... method.htm)
Open it..
We wil get
-1/3≤x<0 and 0<x≤2/5.
- by rattan123
Tue Jul 17, 2012 8:42 am- Forum: Problem Solving
- Topic: Inequality Clarification
- Replies: 7
- Views: 2475
- by rattan123
Tue Jul 17, 2012 8:15 am- Forum: Problem Solving
- Topic: equation
- Replies: 8
- Views: 1410
its true for all fractions except that come between 0 and 1.
x belongs to (-infinity,0)union (1,infinity)..
p.s all real numbers..
- by rattan123
Tue Apr 24, 2012 5:37 am- Forum: Problem Solving
- Topic: X^2>x ?
- Replies: 7
- Views: 1205
it means x cant have values from 0-1 x^2>x x^2-x>0 x(x-1)>0 x can have only positive values..so make a number line..mark 0 and 1 because they are the zeroes..then u will see that the values x is positive as the values ranging from 1 to infinity and in x-1 values are positive i onward..but not for 1....
- by rattan123
Thu Apr 19, 2012 9:54 am- Forum: Problem Solving
- Topic: X^2>x ?
- Replies: 7
- Views: 1205
lets take an eg....156...divide it by 5 then the remainder is 1 and quotient is 31...then we divide it by 4 then the remainder is 3 and quotient is 7...like this.....the values are different in the question...
- by rattan123
Sat Apr 14, 2012 7:22 pm- Forum: Problem Solving
- Topic: remainder...
- Replies: 7
- Views: 2364