find the 10th and 15th term of series 2,4,6...
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20 is the 10th term and 30 is the 15th term
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a=2 d=2
tn=a+(n-1)d
t10=2+(10-1)2
=2+9×2
=2+18
20
10th=20
t15=2+(15-1)2
=2+14×2
=2+28
=30
15th=30
tn=a+(n-1)d
t10=2+(10-1)2
=2+9×2
=2+18
20
10th=20
t15=2+(15-1)2
=2+14×2
=2+28
=30
15th=30
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