Question

100 50
sigma n- sigma n
n=51 n=1

Answer 1

will u draw it?? itz not clear

Answer 2

\[\sum_{51}^{100}n-\sum_{1}^{50}n\]

Answer 3

{(101*100)/2}-2*{(51*50)/2}

Answer 4

\[\sum_{1}^{50}n=(50*51)/2\]