Question

How much is 1 3 +2 3 +3 3 +4 3 +5 3 +...+100 3

Answer 1

If what you meant is 1*3+2*3+.....+100*3
answer is 3(1+2+3+4+5+.....+100)
⇒3($\frac{100(101)}{2}$)
⇒3(5050)
⇒15150
therefore and.=15150