Given ƒ(x) = 3x
4 + 6x
3 - 123x
2 - 126x + 1080
Determine the 2nd derivative ƒ''(x)
Start ƒ''(x)
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = 3, n = 4
and x is the variable we derive
ƒ''(x) = 3x
4ƒ''(x)( = 3 * 4)x
(4 - 1)ƒ''(x) = 12x
3
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = 6, n = 3
and x is the variable we derive
ƒ''(x) = 6x
3ƒ''(x)( = 6 * 3)x
(3 - 1)ƒ''(x) = 18x
2
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = -123, n = 2
and x is the variable we derive
ƒ''(x) = -123x
2ƒ''(x)( = -123 * 2)x
(2 - 1)ƒ''(x) = -246x
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = -126, n = 1
and x is the variable we derive
ƒ''(x) = -126x
ƒ''(x)( = -126 * 1)x
(1 - 1)ƒ''(x) = -126
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = 1080, n = 0
and x is the variable we derive
ƒ''(x) = 1080
ƒ''(x) = 0 <--- The derivative of a constant = 0. This is part of our answer.
Collecting all of our derivative terms
ƒ''(x) =
12x3 + 18x2 - 246x - 126Start ƒ''(x)
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = 3, n = 4
and x is the variable we derive
ƒ''(x) = 3x
4ƒ''(x)( = 3 * 4)x
(4 - 1)ƒ''(x) = 12x
3
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = 6, n = 3
and x is the variable we derive
ƒ''(x) = 6x
3ƒ''(x)( = 6 * 3)x
(3 - 1)ƒ''(x) = 18x
2
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = -123, n = 2
and x is the variable we derive
ƒ''(x) = -123x
2ƒ''(x)( = -123 * 2)x
(2 - 1)ƒ''(x) = -246x
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = -126, n = 1
and x is the variable we derive
ƒ''(x) = -126x
ƒ''(x)( = -126 * 1)x
(1 - 1)ƒ''(x) = -126
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = 1080, n = 0
and x is the variable we derive
ƒ''(x) = 1080
ƒ''(x) = 0 <--- The derivative of a constant = 0. This is part of our answer.
Collecting all of our derivative terms
ƒ''(x) =
12x3 + 18x2 - 246x - 126Start ƒ''(x)
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = 3, n = 4
and x is the variable we derive
ƒ''(x) = 3x
4ƒ''(x)( = 3 * 4)x
(4 - 1)ƒ''(x) = 12x
3
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = 6, n = 3
and x is the variable we derive
ƒ''(x) = 6x
3ƒ''(x)( = 6 * 3)x
(3 - 1)ƒ''(x) = 18x
2
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = -123, n = 2
and x is the variable we derive
ƒ''(x) = -123x
2ƒ''(x)( = -123 * 2)x
(2 - 1)ƒ''(x) = -246x
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = -126, n = 1
and x is the variable we derive
ƒ''(x) = -126x
ƒ''(x)( = -126 * 1)x
(1 - 1)ƒ''(x) = -126
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = 1080, n = 0
and x is the variable we derive
ƒ''(x) = 1080
ƒ''(x) = 0 <--- The derivative of a constant = 0. This is part of our answer.
Collecting all of our derivative terms
ƒ''(x) =
12x3 + 18x2 - 246x - 126Start ƒ''(x)
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = 3, n = 4
and x is the variable we derive
ƒ''(x) = 3x
4ƒ''(x)( = 3 * 4)x
(4 - 1)ƒ''(x) = 12x
3
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = 6, n = 3
and x is the variable we derive
ƒ''(x) = 6x
3ƒ''(x)( = 6 * 3)x
(3 - 1)ƒ''(x) = 18x
2
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = -123, n = 2
and x is the variable we derive
ƒ''(x) = -123x
2ƒ''(x)( = -123 * 2)x
(2 - 1)ƒ''(x) = -246x
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = -126, n = 1
and x is the variable we derive
ƒ''(x) = -126x
ƒ''(x)( = -126 * 1)x
(1 - 1)ƒ''(x) = -126
Use the power rule
ƒ''(x) of ax
n = (a * n)x
(n - 1)For this term, a = 1080, n = 0
and x is the variable we derive
ƒ''(x) = 1080
ƒ''(x) = 0 <--- The derivative of a constant = 0. This is part of our answer.
Collecting all of our derivative terms
ƒ''(x) =
12x3 + 18x2 - 246x - 126Evaluate ƒ''(0)
ƒ''(0) = 12(
0)
3 + 18(
0)
2 - 246(
0) - 126
ƒ''(0) = 12(0) + 18(0) - 246(0) - 126
ƒ''(0) = 0 + 0 + 0 - 126
Final Answer
ƒ''(0) = -126