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Standard XI
Mathematics
NCERT
Question
Find the derivative of the following function from first principle:
−
x
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Solution
Verified by Toppr
Let
f
(
x
)
=
−
x
Thus using first principle
f
′
(
x
)
=
lim
h
→
0
f
(
x
+
h
)
−
f
(
x
)
h
=
lim
h
→
0
−
(
x
+
h
)
−
(
−
x
)
h
=
lim
h
→
0
−
h
h
=
−
1
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