9. Observe the following pattern 1
1+2 = 312712+13)
1+2+3 - 13-(3+1)
1 + 2 + 3+ 4 = 44-1)
2
and find the values of each of the following
(i) 1+ 2+ 3+ 4+ 5+.... + 50
(ii) 31 +32 +.... + 50
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9. Observe the following pattern 1
1+2 = 312712+13)
1+2+3 - 13-(3+1)
1 + 2 + 3+ 4 = 44-1)
2
and find the values of each of the following
(i) 1+ 2+ 3+ 4+ 5+.... + 50
(ii) 31 +32 +.... + 50
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