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प्रश्न
State whether the following sequence is an A.P. or not?
1, 4, 7, 10, ………………..
उत्तर
1, 4, 7, 10, ……
Let ‘d’ be the common difference, ‘a’ be the common ratio, and t2 , t3, t4 be the 2nd, 3rd
and 4th term respectively.
Here t2 = 4, t3 = 7, t4 = 10
d = 4 – 1 = 3
a = 1
We know t2 – a = t3 − t2 = 3
Since the common difference is same throughout the series, therefore the series is an
A.P.
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- Form an A.P representing the number of push-ups per day and hence find the minimum number of days he needs to practice before the day his goal is accomplished?
- Find the total number of push-ups performed by Nitesh up to the day his goal is achieved.
The school auditorium was to be constructed to accommodate at least 1500 people. The chairs are to be placed in concentric circular arrangement in such a way that each succeeding circular row has 10 seats more than the previous one.
- If the first circular row has 30 seats, how many seats will be there in the 10th row?
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OR
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