Advertisements
Advertisements
प्रश्न
Find t5 if a = 3 and d = –3.
Advertisements
उत्तर
tn = a + (n – 1)d
∴ t5 = 3 + (5 – 1)(– 3)
= 3 + 4(– 3)
= 3 – 12
= – 9
संबंधित प्रश्न
If the 9th term of an A.P. is zero, then prove that 29th term is double of 19th term.
Given Arithmetic Progression 12, 16, 20, 24, . . . Find the 24th term of this progression.
Find the 27th term of the following A.P.
9, 4, –1, –6, –11,...
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 tn if a = 20 and d = 3.
Decide whether the given sequence 24, 17, 10, 3,...... is an A.P.? If yes find its common term (tn).
Decide whether 301 is term of given sequence 5, 11, 17, 23,.....
Activity :- Here, d = `square`, therefore this sequence is an A.P.
a = 5, d = `square`
Let nth term of this A.P. be 301.
tn = a + (n – 1) `square`
301 = 5 + (n – 1) × `square`
301 = 6n – 1
n = `302/6` = `square`
But n is not positive integer.
Therefore, 301 is `square` the term of sequence 5, 11, 17, 23,......
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 = ?
If p - 1, p + 3, 3p - 1 are in AP, then p is equal to ______.
Find a and b so that the numbers a, 7, b, 23 are in A.P.
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)`......
