Question

find the 10th term from n ,4,9,14......254​

Answer 1

Answer:

Step-by-step explanation:

By reversing A.P. 254,......,14,9,4

a=254

d=a2-a1

=9-4=5

As A.P is reversed d will negative

Hence d=-5

a10 = a-9d

= 254+9(-5)

= 254-45

=209ans.

Hope that u will understand my explanation!!!!

Answer 2

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Given A. P = 4,9,14.....254 .

First term = 4 .
Common difference = 5 .

Finding, 254 is which Term of the A. P from the beginning .

254 = 4+(n-1)5

250 =( n-1 )5

50 = n-1

n = 51 .

Hence, 254 is the 51 th term of the A. P.

From 254 or end of A. P the tenth term would be 42 term of A. P.

42 th term of A. P = 4 + 41(5)= 4+205 =209 .


The 10th term from the end of the AP 4 ,9, 14.........., 254 is 209