Math, asked by apoorvachandhu, 11 months ago

Is 503 a term of the sequence 9,13,17,21,.......?

Answers

Answered by ashutosh2544

No. for solution see image.

Attachments:

apoorvachandhu: can I know which formula u have used

jrana8803: The answer is wrong it is 125

apoorvachandhu: I just want to know how to do it with using formula

jrana8803: Here a=9 d=4 using the formula an=a+(n-1)d so putting values 503=9+(n-1)4. (n-1)4=494. n-1= 494/4 which will be in decimal so it is not a term of this ap

ashutosh2544: see it start from 90and 4is added frequently.If we take any no.that came in series and we substract it from starting no.i.e.9and divide it by any consecutive difference in no. if it gives natural no. then it came in series.

apoorvachandhu: Thanks I got my answer

Answered by mallelaeswar1986

Answer:

Let

nth term=505

a=9

d=13-9

d=4

nth term of an ap is

an=a+(n-1)d

505 =9+(n-1)4

505=9+4n-4

505=4n+5

4n=505-5

4n=500

n=500/4.

n=125

Step-by-step explanation:

apoorvachandhu: Hey it is not 505 it's 503

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