the sum of nth terms of an AP is 3n square + 5n find its 16 th term
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Sn=3n2 +5n
S1=3+5=8=a
S2=12+10=22
T2 =22-8=14
d=14-8=6
T16=a+15d
=8+15(6)
=8+90
=98
I hope its correct......
S1=3+5=8=a
S2=12+10=22
T2 =22-8=14
d=14-8=6
T16=a+15d
=8+15(6)
=8+90
=98
I hope its correct......
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