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Standard XI
Mathematics
NCERT
Question
If
1
6
!
+
1
7
!
=
x
8
!
, find
x
.
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Solution
Verified by Toppr
Given,
1
6
!
+
1
7
!
=
x
8
!
⇒
1
6
!
+
1
7
×
6
!
=
x
8
×
7
×
6
!
⇒
1
6
!
(
1
+
1
7
)
=
x
8
×
7
×
6
!
⇒
1
+
1
7
=
x
8
×
7
⇒
8
7
=
x
8
×
7
⇒
x
=
8
×
8
×
7
7
∴
x
=
64
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