Answer:
banana fish,naruto,demon slayer 
 
        
                    
             
        
        
        
Answer:
7
Step-by-step explanation:
f(x) means y, it is equal to the value of y, so f(x) = y
so, f(1) means to find the value of y when the value of x is 1, and that is 7, since 7 is the value of y indicated when the value of x is 1.
I hope this is helpful.
 
        
             
        
        
        
Answer:
Cos x = 1 -  +
 +  -
 -  + ...
 + ...
Step-by-step explanation:
We use Taylor series expansion to answer this question.
We have to find the expansion of cos x at x = 0
f(x) = cos x, f'(x) = -sin x, f''(x) = -cos x, f'''(x) = sin x, f''''(x) = cos x
Now we evaluate them at x = 0.
f(0) = 1, f'(0) = 0, f''(0) = -1, f'''(0) = 0, f''''(0) = 1
Now, by Taylor series expansion we have 
f(x) = f(a) + f'(a)(x-a) +  +
 +  +
 +  + ...
 + ...
Putting a = 0 and all the values from above in the expansion, we get,
Cos x = 1 -  +
 +  -
 -  + ...
 + ...