what will be the sum of the first 20 even numbers
Answers
Answered by
2
Answer:
420
Step-by-step explanation:
just add don't need to tell you
Answered by
0
Answer:
420
Step-by-step explanation:
the number series 2,4 6,8,10,12,....40
the first term a=2
the common difference d=2
SUM = N/2×(a+Tn)
20/2 × (2+40)
(20×42)/2
840/2
2+4+6+8+10+12+20......+40=420
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