Byju's Answer
Standard XII
Economics
Ex Ante Consumption
If x changes ...
Question
If x changes from 4 to 4.01, then find the approximate change in
l
o
g
e
x
.
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Solution
Let
y
=
l
o
g
e
x
,
x
=
4
,
Δ
x
=
0.01
∴
d
y
d
x
=
1
x
⇒
d
y
=
(
1
x
)
d
x
⇒
d
y
=
(
d
y
d
x
)
x
=
4
×
Δ
x
=
1
4
×
0.01
So,
d
y
=
1
400
=
0.0025
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