If 2 + 6 + 10 + 14 + 18 +.............. + x = 882 then the value of x
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Step-by-step explanation:
There are two formulae to find the sum of the terms of an AP.
In this case we know the following:
a
=
2
d
=
4
n
=
10
S
n
=
n
2
[
2
a
+
(
n
−
1
)
d
]
S
10
=
10
2
[
2
(
2
)
+
(
9
)
4
]
S
10
=
5
[
4
+
36
]
S
10
=
200
The other formula requires the last term, which is this case we do not know, but if necessary, we could work out.
S
10
=
n
2
(
a
+
l
)
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