Solve
Guides
Join / Login
Use app
Login
0
You visited us
0
times! Enjoying our articles?
Unlock Full Access!
Standard VIII
Mathematics
Question
If
(
y
+
1
y
)
=
12
, then
(
y
3
+
1
y
3
)
is equal to:-
1680
1686
1692
1698
A
1686
B
1698
C
1680
D
1692
Open in App
Solution
Verified by Toppr
We have,
(
y
+
1
y
)
=
12
On taking cube both sides, we get
(
y
+
1
y
)
3
=
12
3
y
3
+
1
y
3
+
3
(
y
+
1
y
)
=
1728
y
3
+
1
y
3
+
3
×
12
=
1728
y
3
+
1
y
3
+
36
=
1728
y
3
+
1
y
3
=
1692
Hence, this is the answer.
Was this answer helpful?
0
Similar Questions
Q1
If
(
y
+
1
y
)
=
12
, then
(
y
3
+
1
y
3
)
is equal to:-
View Solution
Q2
If
x
+
y
−
1
=
0
, then
x
3
+
y
3
−
1
is equal to
View Solution
Q3
Find
y
3
−
1
y
3
, if
y
−
1
y
=
9
View Solution
Q4
If
y
−
1
y
=
9
, find the value of
y
3
−
1
y
3
View Solution
Q5
Simplify:
(
y
3
−
5
y
2
)
÷
y
×
(
y
−
1
)
, then the answer is
y
3
−
6
y
2
+
5
y
If true then enter
1
and if false then enter
0
View Solution