Integer (Z)= ...-3,-2,-1,0,1,2 3,4...
A.If you add two integers you will get ineger
Like 4 + 5 = 9
Integer+integer=integer
So , you can say integers are closed under addition....
This is one of my videos of word problems of quadratic equations.
There are more of them, one can go through and get an idea of the topic quadratic equations
Solid State (25 Marks):
1. Name one solid which show both Frenkel defect & Schottky defect.
2. In a close packing of N spheres how many (i) tetrahedral (ii) octahedral sites are present?
3. Describe...