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Byju's Answer
Standard XII
Mathematics
nth Term of A.P
If 1 7 + x ...
Question
If
1
7
+
x
7
=
3
, calculate the value of
x
.
A
20
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B
7
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C
3
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D
1
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Solution
The correct option is
A
20
Given :-
1
7
+
x
7
=
3
multiplying
7
to both sides
⇒
1
+
x
=
21
⇒
x
=
21
−
1
⇒
x
=
20
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Q.
If
x
-
1
x
=
7
, find the value of
x
3
-
1
x
3