In an ap the sum of its first n terms is 2+2n find its 18 term
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Answer:
It is given that Sn=2+2n
And S18-S17= a18. ..........(I)
S18=2+2(18)
=2+36
=38
S17=2+2(17)
=2+34
=36
Putting these values in equation 1 we get
S18-S17=a18
=38-36
=2 Ans.
Step-by-step explanation:
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