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Byju's Answer
Standard X
Mathematics
Arithmetic Progression
3 numbers are...
Question
3 numbers are an AP. If the sum of these numbers is 27 and product is 648, find the numbers.
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Solution
Let
the
3
numbers
be
a
-
d
,
a
and
a
+
d
.
Now
,
sum
of
3
numbers
=
27
⇒
a
-
d
+
a
+
a
+
d
=
27
⇒
3
a
=
27
⇒
a
=
27
3
=
9
Now
,
product
of
the
numbers
=
648
⇒
a
-
d
a
+
d
a
=
648
⇒
9
-
d
9
+
d
×
9
=
648
⇒
81
-
d
2
=
72
⇒
d
2
=
9
⇒
d
=
3
or
d
=
-
3
When
d
=
3
,
we
get
the
numbers
as
:
9
-
3
;
9
,
9
+
3
i
.
e
.
6
,
9
,
12
When
d
=
-
3
,
then
the
numbers
are
:
9
+
3
,
9
,
9
-
3
i
.
e
.
12
,
9
,
6
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