Question

Study the following pattern1
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) 2 + 4 + 6 + 8 + 10 + …….. + 100

Answer 1

Answer:first answer is 55

And second answer is 750

Step-by-step explanation:no need of applying that disgusting formulas .....It will take a long time .... Instead use ARITHMETIC PROGRESSION formula

MARK IT AS BRAINKIEST ........FOLLOW ,LIKE TO GET MORE ANSWERS

Answer 2

ANSWER:

(1)

$1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 10 \times 11 \div 2$

(2)

$2 + 4 + 6 + 8 + 10 + ...... + 100 = 100 \times 101 \div 2$