Find a complex number for which f (a + bi) is a real number. Which of the following complex number would give you a real number
when evaluated in the function f (x) = x2 + 4x + 7
a. 2-3i
b. 1-2i
c. 4+2i
d. -2-4i

find the magnitude of the trig term  

csc

(

x

)

−

1

by taking the absolute value of the coefficient.

1

find the lower bound of the range.

tap for more

y

=

−

2

find the upper bound of the range.

tap for more

y

=

0

the range is  

y

≤

−

2

or  

y

≥

0

.

(

−

∞

,

−

2

]

∪

[

0

,

∞

)

{

y

|

y

≤

−

2

,

y

≥

0

}

step-by-step explanation:

853.3

step-by-step explanation:

where's the diagram?

step-by-step explanation: