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Mathematics
Mathematics
Problem
For the arithmetic progression whose first term is
23
23
23
and common difference is
2.5
2.5
2.5
, which of the following ordered pairs
(
a
12
,
a
40
)
(a_{12},\,a_{40})
(
a
12
,
a
40
)
is correct? a)
(
53
,
123
)
(53,\;123)
(
53
,
123
)
b)
(
50.5
,
120.5
)
(50.5,\;120.5)
(
50.5
,
120.5
)
c)
(
48
,
118
)
(48,\;118)
(
48
,
118
)
d)
(
50
,
122.5
)
(50,\;122.5)
(
50
,
122.5
)
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