If the sum of first n terms of an AP is 4n-n2, find the 10th
term
Answers
Answered by
2
Step-by-step explanation:
1st nth = 4n-n2
10th = 4x10 - 10x2
= 40-20
= 20
Answered by
1
Step-by-step explanation:
sum of nth term= 4n-n²
S10 = 4*10-100
= -60
S9 = 36-81
= -45
A10 = S10-S9
= -60 - (-45)
= -15
therefore 10th term is -15
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