Hi,
You just have to change z^25 to z^24 or z^27.
(a-b) X (a+b)
= aXa - bXa +aXb -bXb (distributing)
Now, cross product of a vector with itself = 0
so, aXa = 0, bXb = 0
Also, aXb = - bXa
so,
(a-b) X (a+b) = 0 + aXb + aXb + 0
= 2aXb
hence, proved :)
Answer:
The value of f(30) is equal to 2.
Step-by-step explanation:
The given expression is :
We need to find the value of f(30)
Put x = 30 in above expression.
So,
Hence, the value of f(30) is equal to 2.