Question

find the sum of 1*2*3*4+2*3*4*5+3*4*5*6+ and so on upto 100 terms

Answer 1

Answer:

1+2*2+3*3+4*4+5*4+6*4+7*4 ,,,,,,*4,,,,,,,,*4,,,,,,,,97*3+98*2+100*1

this is the process u may slove it