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NDA · Maths · Sequence & Series
NDA Sequence & Series — Formulas 2
Question
1
of 13
1.
What is the arithmetic mean (AM) of a and b?
A
AM
=
2
a
b
a
+
b
\text{AM} = \frac{2ab}{a+b}
AM
=
a
+
b
2
ab
B
AM
=
a
+
b
2
\text{AM} = \frac{a+b}{2}
AM
=
2
a
+
b
C
AM
=
a
b
\text{AM} = \sqrt{ab}
AM
=
ab
D
AM
=
a
−
b
2
\text{AM} = \frac{a-b}{2}
AM
=
2
a
−
b
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