Question

8. Study the following pattern: 1 = (1 × 2)/ 2 1 + 2 = (2 × 3)/ 2 1 + 2 + 3 = (3 × 4)/ 2 1 + 2 + 3 + 4 = (4 × 5)/ 2 By observing the above pattern, find (i) 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 (ii) 50 + 51 + 52 + ……. + 100 (iii) 2 + 4 + 6 + 8 + 10 + …….. + 100 answer it fast

Answer 1

Step-by-step explanation:

i) (10×11)/2=55

ii) (100×101)/2 -(49×50)/2=5050 - 1225=3825

iii) (100×101)/-(1×2)/2=5050-1=5049