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Byju's Answer
Standard VIII
Mathematics
Addition and Subtraction of Algebraic Expression
find the deri...
Question
find the derivative of, x/2x+1 with respect to x from first principle.
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Solution
Let
y
=
x
2
x
+
1
⇒
y
+
∆
y
=
x
+
∆
x
2
x
+
∆
x
+
1
⇒
∆
y
=
x
+
∆
x
2
x
+
∆
x
+
1
-
x
2
x
+
1
⇒
∆
y
=
x
+
∆
x
2
x
+
1
-
x
2
x
+
2
∆
x
+
1
2
x
+
2
∆
x
+
1
2
x
+
1
⇒
∆
y
=
2
x
2
+
x
+
2
x
∆
x
+
∆
x
-
2
x
2
-
2
x
∆
x
-
x
2
x
+
2
∆
x
+
1
2
x
+
1
⇒
∆
y
=
∆
x
2
x
+
2
∆
x
+
1
2
x
+
1
⇒
∆
y
∆
x
=
1
2
x
+
2
∆
x
+
1
2
x
+
1
⇒
lim
∆
x
→
0
∆
y
∆
x
=
lim
∆
x
→
0
1
2
x
+
2
∆
x
+
1
2
x
+
1
⇒
dy
dx
=
1
2
x
+
1
2
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