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Let’s check out your problem:
f
(
V
)
=
V
3
20
−
7
⋅
V
2
+
265
⋅
V
f(V)=\frac{V^{3}}{20}-7 \cdot V^{2}+265 \cdot V
f
(
V
)
=
20
V
3
−
7
⋅
V
2
+
265
⋅
V
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Home
Math Problems
Algebra 2
Sum of finite series not start from 1
Full solution
Q.
f
(
V
)
=
V
3
20
−
7
⋅
V
2
+
265
⋅
V
f(V)=\frac{V^{3}}{20}-7 \cdot V^{2}+265 \cdot V
f
(
V
)
=
20
V
3
−
7
⋅
V
2
+
265
⋅
V
Differentiate
V
3
/
20
V^3/20
V
3
/20
:
Differentiate the term
V
3
/
20
V^3/20
V
3
/20
. Using the power rule, the derivative of
V
3
V^3
V
3
is
3
V
2
3V^2
3
V
2
. So,
(
V
3
/
20
)
′
=
3
V
2
/
20
(V^3/20)' = 3V^2/20
(
V
3
/20
)
′
=
3
V
2
/20
.
Differentiate
−
7
V
2
-7V^2
−
7
V
2
:
Differentiate the term
−
7
V
2
-7V^2
−
7
V
2
. Using the power rule, the derivative of
V
2
V^2
V
2
is
2
V
2V
2
V
. So,
(
−
7
V
2
)
′
=
−
7
×
2
V
=
−
14
V
(-7V^2)' = -7 \times 2V = -14V
(
−
7
V
2
)
′
=
−
7
×
2
V
=
−
14
V
.
Differentiate
265
V
265V
265
V
:
Differentiate the term
265
V
265V
265
V
.
\newline
The derivative of
V
V
V
with respect to
V
V
V
is
1
1
1
.
\newline
So,
(
265
V
)
′
=
265
×
1
=
265
(265V)' = 265 \times 1 = 265
(
265
V
)
′
=
265
×
1
=
265
.
Combine derivatives:
Combine the derivatives from steps
1
1
1
to
3
3
3
.
\newline
f
′
(
V
)
=
3
V
2
20
−
14
V
+
265
f'(V) = \frac{3V^2}{20} - 14V + 265
f
′
(
V
)
=
20
3
V
2
−
14
V
+
265
.
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