Find the sum
(a)1+2+3+.....+20
(b)3+6+9+.....+60
(c)5+8+11+....+62
(d)2+4+6+......+20.
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Answered by
3
Answer:
(a)1+2+3+.....+20
(b)3+6+9+.....+60
(c)5+8+11+....+62
(d)2+4+6+......+20.
Answered by
5
Answer:
a) 1 + 2 + 3 +.......................................+ 20= 210
(b) 3 + 6 +. 9 +..................................... + 60= 630
(c) 5 + 8 + 11 +.....................................+ 62= 670
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