rationalise the denominator of 1/7_4√3
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0
Answer:
Correct option is
A
3
7
+2
We use the identity (a+
b
)(a−
b
)=a
2
−b.
Multiply and divide
7
−2
1
by
7
+2 to get
7
−2
1
×
7
+2
7
+2
=
7−4
7
+2
=
3
7
+2
Hence, option A.
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