Question
If the 11th and13th terms of an AP are 35 and 41 respectively, then its common difference is ___.
Answer: Option D
:
D
The nth term of an A.P, with first term a and common difference d is given by
Tn=a+(n−1)d.
⇒a11=a+10d=35...(1)
a13=a+12d=41...(2)
Solving equations (1) and (2), we get
2d=6.
⇒d=3
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:
D
The nth term of an A.P, with first term a and common difference d is given by
Tn=a+(n−1)d.
⇒a11=a+10d=35...(1)
a13=a+12d=41...(2)
Solving equations (1) and (2), we get
2d=6.
⇒d=3
Was this answer helpful ?
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