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UPSC CDS Math Basic operation and Factorisation Questions
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© examsnet.com
Question : 16
Total: 77
If
a
x
=
b
y
=
c
z
and
b
2
= ac, then what is
1
x
+
1
z
equal to
[2019 CDS-I]
1
y
−
1
y
2
y
−
2
y
Validate
Solution:
b
=
a
x
y
b
=
a
z
y
b
2
=
a
c
x
y
=
1
,
z
y
=
1
x
=
y
=
z
1
x
+
1
z
=
2
y
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