Answer:
(I) Ans. 52 (ii) Ans. 2√3 (iii) Ans. 30√3
Step-by-step explanation:
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Given, x+
x
1
=4.
On taking cubes on both sides,
∴(x+
)
3
=4
∴x
+
+3.x.
(x+
)=64
=64−3.x.
=64−3(x+
=64−3(4)
=64−12=52.
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Answer:
(I) Ans. 52 (ii) Ans. 2√3 (iii) Ans. 30√3
Step-by-step explanation:
I hope you have helpful friend
please like , 5 star rating and mark brain list
Thank you
Given, x+
x
1
=4.
On taking cubes on both sides,
∴(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
)
∴x
3
+
x
3
1
=64−3(x+
x
1
)
=64−3(4)
=64−12=52.