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Byju's Answer
Standard XII
Mathematics
nth Term of A.P
Which term of...
Question
Which term of the sequence 72, 70, 68, 66, ... is 40 ?
A
14
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B
15
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C
16
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D
17
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Solution
The correct option is
D
17
Here,
a
=
42
,
d
=
−
2
a
n
=
40
a
+
(
n
−
1
)
d
=
40
72
+
(
n
−
1
)
(
−
2
)
=
40
2
n
=
34
n
=
17
Hence, 17th term of the given sequence is 40.
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Q.
Calculate the correlation coefficient between the heights of fathers in inches (X) and their sons (Y)
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Y
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