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RRB RPF RPSF SI and CONS Model Papers 5 with solutions
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© examsnet.com
Question : 4
Total: 119
If
√
8
−
3
√
8
+
3
=
3
a
√
8
−
b
, then
a
=
?
2
0
1
3
Validate
Solution:
(1)
√
8
−
3
√
8
+
3
=
3
a
√
8
−
b
On Rationalising, we get,
√
8
−
3
√
8
+
3
=
√
8
−
3
√
8
+
3
×
√
8
−
3
√
8
−
3
=
8
+
9
−
6
√
8
8
−
9
Now, according to Question
6
√
8
−
17
=
3
a
√
8
−
b
By comparing LHS and RHS, we get,
3a = 6 and b = 17
∴ a = 2
© examsnet.com
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