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Choose the correct alternative answer for the following sub-question If the third term and fifth term of an A.P. are 13 and 25 respectively, find its 7th term - Algebra

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प्रश्न

Choose the correct alternative answer for the following sub-question

If the third term and fifth term of an A.P. are 13 and 25 respectively, find its 7th term

विकल्प

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MCQ

उत्तर

37

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अध्याय 3: Arithmetic Progression - Q.1 (A)

संबंधित प्रश्न

Find the term t15 of an A.P. : 4, 9, 14, …………..


Find the sum of  the following arithmetic series:

34 + 32 + 30 +...+10


Decide whether the following sequence is an A.P., if so find the 20th term of the progression:

–12, –5, 2, 9, 16, 23, 30, ..............


Find the 19th term of the following A.P.:

7, 13, 19, 25, ...


Find the 27th term of the following A.P.
9, 4, –1, –6, –11,...


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 ? 

 


Find the 23rd term of the following A.P.: 9, 4,-1,-6,-11.


Find t5 if a = 3 आणि d = −3


Decide whether the given sequence 24, 17, 10, 3, ...... is an A.P.? If yes find its common term (tn)


How many two-digit numbers are divisible by 5?

Activity :-  Two-digit numbers divisible by 5 are, 10, 15, 20, ......, 95.

Here, d = 5, therefore this sequence is an A.P.

Here, a = 10, d = 5, tn = 95, n = ?

tn = a + (n − 1) `square`

`square` = 10 + (n – 1) × 5

`square` = (n – 1) × 5

`square` = (n – 1)

Therefore n = `square`

There are `square` two-digit numbers divisible by 5


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


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.


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