The sum of n terms in an ap is 5n²-3n find the ap and 10term
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Answers
Answered by
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a1=5(1)2-3(1) =7
a2=5(2)2-3(2)=14
a3=5(3)2-3(3)=36
a10=a+9d
a2=5(2)2-3(2)=14
a3=5(3)2-3(3)=36
a10=a+9d
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Answered by
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Answer:
Step-by-step explanation:
Sn=5n²-3n
If n=1,Sn=5-3=2
If n=2,S2=20-6=14
If n=3,S3=45-9=36
a=S1
a2=S2-S1=12
a3=S3-S2=22
AP:2,12,22
a10=a+9d
=2+90=92
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