the sum of first 20 odd natural numbers is
A)100
B)210
C)400
D)420
Answers
Answered by
2
Hi
The answer is
D) 400
Answered by
7
1,3,5,7..........
common difference =3-1=2
s20=20/2{2×1+(20-1)×2}
s20=10{2+38)
s20=400
☺️ThAnKs●●
@ArJuN$◆◆❤️❤️
common difference =3-1=2
s20=20/2{2×1+(20-1)×2}
s20=10{2+38)
s20=400
☺️ThAnKs●●
@ArJuN$◆◆❤️❤️
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