Question

first term of ap 5,8,11,...... is​

Answer 1

Answer:

hii

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Step-by-step explanation:

Given series is 5,8,11,14,....

Let 51 be the nth term. 

∴an=51

a=5,d=3

We know, an=a+(n−1)d

∴51=a+(n−1)d

51=5+(n−1)3

346=n−1

346+3=n

n=349

Since n is not a natural no.

51 is not a term of AP.

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Answer 2

Step-by-step explanation:

Given series is 5,8,11,14,....

Let 51 be the n

th

term.

∴a

n

=51

a=5,d=3

We know, a

n

=a+(n−1)d

∴51=a+(n−1)d

51=5+(n−1)3

3

46

=n−1

3

46+3

=n

n=

3

49

Since n is not a natural no.

51 is not a term of AP.