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Byju's Answer
Standard VII
Mathematics
Addition of Algebraic Expressions
Like dx/dy=1/...
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Like dx/dy=1/dy/dx d^2x/dy^2=-(d^2y/dx^2).(dy/dx)^-3 d^3x/dy^3=-((dy/dx).(d^3y/dx^3)-3(d^2y/dx^2)^2)/(dy/dx)^5 What is d^4x/dy^4 and also what is d^5x/dy^5
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Q.
If
y
=
f
(
x
)
is a differentiable function, then show that
d
2
x
d
y
2
=
−
(
d
y
d
x
)
−
3
d
2
y
d
x
2
Q.
y=f(x) be a real valued twice differentiable function defined on R, then
d
2
y
d
x
2
(
d
x
d
y
)
3
+
d
2
x
d
y
2
=
Q.
The order and degree of :
A)
y
=
1
+
(
d
y
d
x
)
1
+
1
2
!
(
d
y
d
x
)
2
+
1
3
!
(
d
y
d
x
)
3
+
.
.
.
.
.
B)
d
2
y
d
x
2
=
x
l
o
g
(
d
y
d
x
)
Q.
Find order and degree of the following differential equations .
(i)
d
y
d
x
+
y
=
1
d
y
d
x
(ii)
e
[
d
y
d
x
−
d
3
y
d
x
3
]
=
l
n
[
d
5
y
d
x
5
+
1
]
(iii)
[
(
d
y
d
x
)
1
/
3
+
y
]
2
=
d
2
y
d
x
2
Q.
d
2
x
d
y
2
e
q
u
a
l
s
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