NDA2010MathematicsVector AlgebraActual
What is the geometric interpretation of the identity ( a - b ) ( a + b )=2( a b ) ? I. If the diagonals of a given parallelogram are used as sides of a second parallelogram, then the area of the second parallelogram is twice that of the given parallelogram. II. If the semi-diagonals of a given parallelogram are used as sides of a second parallelogram, then the area of the second parallelogram is half that of the give
Options
- AI only
- BII only
- CBoth I and II
- DNeither I nor II
Correct answer
C. Both I and II
Step-by-step solution
The correct answer is option (C).