Math, asked by deepanshumeena0019, 1 year ago

the 11th term of an ap is 80 and the 16th term is 110. Find the 31st term.

Answers

Answered by bebita54

ohhh khngeee2 .........

deepanshumeena0019: kya answer h ye chutiye

blasterblade2017: Come on bebita i was gping to ans it

deepanshumeena0019: when will u answer

blasterblade2017: She already did it

bebita54: oh srry mistake ho gayi

bebita54: answer bechtihu

bebita54: so the 31st term is 200th term

Answered by purvisri02

Answer:

Step-by-step explanation:

a11 = 80

a16 = 110

a(n) = a+(n-1)d

a(11) = a+10d

80 = a+10d. ........(1)

a(16) = a+15d

110 = a+15d .........(2)

From (1) and (2) we get,

a = 20

d = 6

a(31) = 20+30(6)

a(31) = 200.

deepanshumeena0019: thnx

purvisri02: Welcome

deepanshumeena0019: second last line me

deepanshumeena0019: 30 kaise aaya please help

deepanshumeena0019: ok i understood

purvisri02: (n-1) so there it is (31-1)=30

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