This problem is quite simple, I'll try to help you understand why it is~
f(x) is NOT f times x, but it is f, the function of x.
This means that the value of f depends on the value of x. f(1) means the value of the function, f, when x = 1.
Thus, f(3) is the value of the function, f(x), when x = 3. According to the table, f(x) is 1 when x is 3. That should be your answer.
Please do let me know if you still do not understand.
Happy Studying~
Answer:
Step-by-step explanation:
√2, 1.5, 2π.
c
x⁴ - 11x² + 28
= x⁴ - 4x² - 7x² + 28
= x²(x² - 4) - 7(x² - 4)
= (x² - 7)(x² - 4)
5i is an imaginary number
