Question
Question: The <img src="https://cdn.pureessence.tech/canvas_652.png?top_left_x=0&top_left_y=300&width=300&heig...
The term of the series 2×4+4×6+6×8+……will be.
A
1600
B
1680
C
420
D
840
Answer
1680
Explanation
Solution
The given series 2×4+4×6+6×8… nth terms
Tn=2n⋅2(n+1)=4n(n+1)
Putting n=20, we get .