steiner1745
steiner1745
About
- Username
- steiner1745
- Joined
- Visits
- 0
- Last Active
- Roles
- Member
Comments
-
I think this is false. Look at f(x) = 0 if x <=0, f(x) = x >= 0. The derivative is the unit step function, which is not continuous at 0 and there is no value of x for which f'(x) = 0. Hope this makes sense!
-
No. It has a factor of 11. 11*11=121. 121 is a square number.
-
True. To have a square, each a_i must be even.
-
Yes. It's not divisible by any prime less than its square root, i.e., 2,3,5 or 7.
-
That's -(-125) or 125. Do the parentheses first.
-
That's -(-125) or 125. Do the parentheses first.
-
That's -(-125) or 125. Do the parentheses first.
-
Yes. It's not divisible by any prime less than its square root, i.e., 2,3,5 or 7.
-
Yes. It's not divisible by any prime less than its square root, i.e., 2,3,5 or 7.
-
True. To have a square, each a_i must be even.
-
I think this is false. Look at f(x) = 0 if x <=0, f(x) = x >= 0. The derivative is the unit step function, which is not continuous at 0 and there is no value of x for which f'(x) = 0. Hope this makes sense!