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Byju's Answer
Standard XII
Mathematics
Geometric Interpretation of Def.Int as Limit of Sum
If ∫a-a|x|+|x...
Question
If
∫
a
−
a
(
|
x
|
+
|
x
−
2
|
)
d
x
=
22
,
(
a
>
2
)
and
[
x
]
denotes the greatest integer
≤
x
, then
∫
−
a
a
(
x
+
[
x
]
)
d
x
is equal to
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Solution
∫
0
−
a
(
−
2
x
+
2
)
d
x
+
∫
2
0
(
x
+
2
−
x
)
d
x
+
∫
a
2
(
2
x
−
2
)
d
x
=
22
⇒
(
x
2
−
2
x
)
∣
∣
∣
−
a
0
+
(
2
x
)
∣
∣
∣
2
0
+
(
x
2
−
2
x
)
∣
∣
∣
a
2
=
22
⇒
a
2
+
2
a
+
4
+
a
2
−
2
a
−
(
4
−
4
)
=
22
⇒
2
a
2
=
18
⇒
a
=
3
Now
∫
−
3
3
(
x
+
[
x
]
)
d
x
=
−
(
∫
3
−
3
(
x
+
[
x
]
)
d
x
)
=
−
(
∫
3
−
3
[
x
]
d
x
)
,
(
∵
∫
3
−
3
x
d
x
=
0
)
=
−
(
−
3
−
2
−
1
+
0
+
1
+
2
)
=
3
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0
Similar questions
Q.
If
[
x
]
denotes the greatest integer less than or equal to
x
then
∫
∞
0
[
2
e
x
]
d
x
is?
Q.
Let
f
:
R
→
R
f
(
x
)
{
|
x
−
2
[
x
]
|
,
[
x
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i
s
o
d
d
|
2
x
−
[
x
+
1
]
|
,
[
x
]
i
s
e
v
e
n
}
where [.] denotes greatest integer function, then
∫
−
2
2
f
(
x
)
d
x
is equal to
Q.
If
∫
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[
x
]
x
d
x
=
∫
0
x
[
x
]
d
x
. where
[
.
]
denotes greatest integer function of
x
then
∫
2
1
x
d
x
equals?
Q.
If
[
x
]
denotes the greatest integer less than or equal to
x
,
then the value of the integral
∫
2
0
x
2
[
x
]
d
x
equals?
Q.
If
−
∫
200
π
0
[
sin
x
+
cos
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]
d
x
=
A
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and
[
x
]
denotes the greatest integer function then
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is equal to
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