[(1/2)-1 + (2/3)2 – (3/4)°]-2 is equal to-
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2
Explanation:
To simplify
1
2
+
2
3
+
3
4
, we can add them if the denominators are common. Now as LCD of the denominators
2
,
3
and
4
is
12
1
2
+
2
3
+
3
4
=
(
1
2
×
1
)
+
(
2
3
×
1
)
+
(
3
4
×
1
)
=
1
×
6
2
×
6
+
2
×
4
3
×
4
+
3
×
3
4
×
3
=
6
12
+
8
12
+
9
12
=
6
+
8
+
9
12
=
23
12
or
(
12
+
11
12
)
or
(
12
12
+
11
12
)
or
1
11
12
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