Find sum of first 10 terms of an Ap whose n th term is 2n minus 3 by 6
Answers
Answered by
0
Step-by-step explanation:
S
n
=2n
2
+3n
We know that nth term of AP is given by
a
n
=S
n
−S
n−1
⟹a
n
=2n
2
+3n−2(n−1)
2
−3(n−1)
⟹a
n
=4n+1
Tenth term=a
10
=4×10+1
⟹a
10
=41
Answered by
2
Answer:
S
n
=2n
2
+3n
We know that nth term of AP is given by
a
n
=S
n
−S
n−1
⟹a
n
=2n
2
+3n−2(n−1)
2
−3(n−1)
⟹a
n
=4n+1
Tenth term=a
10
=4×10+1
⟹a
10
=41
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