Question

find 20th term and sum of 20th term of series 2*4+4*6+6*8+........ ​

Answer 1

Answer:

20th term is 1680

Step-by-step explanation:

2*4+4*6+6*8+....................

nth term of the series is (2n*2(n+1))

20th term=(2*20*2(20+1))=(40*2*21)=(80*21)=1680