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Byju's Answer
Standard VIII
Mathematics
Expansion of (x^2 - y^2)
Prove that th...
Question
Prove that the minima of [4e^(2x)]+[9e^(-2x)] is 12.
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Q.
Let
f
(
x
)
=
4
e
x
cos
2
x
−
9
e
−
x
cot
2
x
,
g
(
x
)
=
4
e
x
+
9
e
−
x
,
then the minimum value of
g
(
x
)
−
f
(
x
)
is
Q.
Find the point of local maxima and minima of
2
x
3
−
3
x
2
−
12
x
+
12.
Q.
∫
4
e
x
+
6
e
−
x
9
e
x
−
4
e
−
x
d
x
=
A
x
+
B
log
(
9
e
2
x
−
4
)
+
c
, then
A
=
Q.
∫
4
e
x
+
6
e
−
x
9
e
x
−
4
e
−
x
d
x
=
A
x
+
B
log
|
9
e
2
x
−
4
|
+
c
, then
(
A
,
B
)
=
Q.
If
a
+
ib
=
, prove that
a
2
+
b
2
=
,
prove that a2 + b2 =
