MHT CET2011MathematicsMathematical Reasoning
The value of (1+ )(1- ) is
Options
- A0
- B-1
- C1
- DNone of these
Correct answer
C. 1
Step-by-step solution
We have, (1+ )(1- ) f(x) array l =(1+ ) (1- ) f(x) =(1+ ) f(x)- f(x) =(1+ )[f(x)- f(x)-f(x-h) ] =(1+ ) f(x-h)=E f(x-h) [ (E=1+ )] =f(x)=1 f(x) array Thus, (1+ )(1- ) f(x)=1 f(x) , for any function f(x) . (1+ )(1+ )=1