Advertisements
Advertisements
प्रश्न
Find the 19th term of the following A.P.:
7, 13, 19, 25, ...
Advertisements
उत्तर
The given sequence is 7, 13, 19, 25, ....
Here,
First term = a = t1 = 7, t2 = 13, t3 = 19, t4 = 25, ....
Common difference = d = t2 − t1
= 13 – 7
= 6
To find the 19th term, we have to use the formula, i.e.,
tn = a + (n − 1)d
∴ t19 = 7 + (19 − 1) × 6 ...(On substituting value)
= 7 + 18 × 6
= 7 + 108
= 115
Hence, the 19th term of the progression is 115.
APPEARS IN
संबंधित प्रश्न
Find the term t15 of an A.P. : 4, 9, 14, …………..
Find the sum of the following arithmetic series:
`7 + 10 1/2 + 14 + ....... + 84`
Find the sum of the following arithmetic series:
(-5)+(-8)+(-11)+...+(-230)
Six year before, the age of mother was equal to the square of her son's age. Three year hence, her age will be thrice the age of her son then. Find the present ages of the mother and son.
Select the correct alternative and write it.
What is the sum of first n natural numbers ?
For a given A.P. a = 3.5, d = 0, then tn = _______.
Find the 23rd term of the following A.P.: 9, 4,-1,-6,-11.
If the sum of first n terms of an AP is n2, then find its 10th term.
If third term and fifth term of an A.P. are 13 and 25 respectively, find its 7th term.
Find t5 if a = 3 and d = –3.
12, 16, 20, 24,...... Find 25th term of this A.P.
If tn = 2n – 5 is the nth term of an A.P., then find its first five terms.
The nth term of an A.P. 5, 8, 11, 14,...... is 68. Find n = ?
In an A.P. if the sum of third and seventh term is zero. Find its 5th term.
Write the next two terms of the A.P.: `sqrt(27), sqrt(48), sqrt(75)`......
