Answer:
Convergent
cos 1 − 1
Step-by-step explanation:
∑ (cos 1/n² − cos 1/(n+1)²)
= lim(n→∞) [(cos 1 − cos 1/4) + (cos 1/4 − cos 1/9) + ... + (cos 1/n² − cos 1/(n+1)²)]
= lim(n→∞) [cos 1 − cos 1/(n+1)²]
= cos 1 − cos 0
= cos 1 − 1
The series converges to cos 1 − 1.
Is there another part of this?
Answer:

Step-by-step explanation:
Given:

Required:
f(g(x))=?
Solution:
let f(g(x))=f(X), where X=g(x)
so 
put X=
, we get


Answer:
Step-by-step explanation:
Let the number be 'x'
Half a number = 
Half a number increased by the quotient of p and t

Answer:
x^2 - 2001 = 0
Step-by-step explanation:
I guess you mean √2001 and -√2001
The product of the 2 solutions = -2001 and the sum is 0.
The required equation is x^2 - 2001 = 0