.If x + 1/x= 4 , then find X³ + (1/x)³
Answers
Answered by
2
Answer:
52
Step-by-step explanation:
x+
x
1
=4
∴(x+
x
1
)
3
=4
3
∴x
3
+
x
3
1
+3.x.
x
1
(x+
x
1
)=64
x
3
+
x
3
1
=64−3.x.
x
1
(x+
x
1
)
=64−3(4)
=64−12=52
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