9514 1404 393
Answer:
B, D
Step-by-step explanation:
The quadratic expands to ...
(2n -1)² = (2n)² +2(2n)(-1) +(-1)² = 4n² -4n +1
The coefficients can be factored out of the sum, so ...
∑(4n²) = 4∑n² for example
The sum of 60 ones is 60:
So, the sum can be written as ...
_____
It appears that the key to choosing the correct answers is paying attention to signs.
Answer:
Linear, Quadratic, Radical, Absolute Value, Cubic, Cube Root
Step-by-step explanation:
To find:
Which functions have an intercept at (0, 0).
That means, when we put a value in the
, value of
.
Let us discuss each <em>parent</em> function one by one:
1. Linear:
When we put x = 0, y = 0
Therefore, it has intercept at (0, 0).
2. Quadratic:
When we put x = 0, y = 0
Therefore, it has intercept at (0, 0).
3. Radical:
When we put x = 0, y = 0
Therefore, it has intercept at (0, 0).
4. Absolute Value:
When we put x = 0, y = 0
Therefore, it has intercept at (0, 0).
5. Rational:
When we put
Therefore, it does not have intercept at (0, 0).
6. Exponential:
b is any base
When we put
Therefore, it does not have intercept at (0, 0).
7. Logarithmic:
When we put Not defined
Therefore, it does not have intercept at (0, 0).
8. Cubic:
When we put
Therefore, it has intercept at (0, 0).
9. Cube Root:
When we put
Therefore, it has intercept at (0, 0).
