please answer the question
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nkkllkkk ......m......
Answered by
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Answer:
The answer to your question is: 40
Step-by-step explanation:
putting, n= 1, S1 = 7/2(1²) + 17/2(1) = 7/2+17/2 = 12
n=2, S2 = 7/2(2²) +17/2(2) = 14 + 17 = 31
We know that S1=a=12
S2 = T1 + T2
31 = 12 + T2
T2 = 31-12 = 19
So now we have, a = 12, d = 19 - 12 = 7
we have to find nth term, so using the formula
T5 = a+(n-1) d
= 12+(5-1)7
= 12+ 4(7)
= 12+28
= 40
Hope it helped you!
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