1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20..........+100
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Answered by
5
a= 1
d = 1
n = 100
Sn = n/2 [2a+(n-1)d]
S100 = 50[2 + 99]
S100 = 50 × 101 = 5050
d = 1
n = 100
Sn = n/2 [2a+(n-1)d]
S100 = 50[2 + 99]
S100 = 50 × 101 = 5050
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Answered by
3
a=1 d=1 sn=100
therefore , sn=n/2(2a +(n-1)d)
s100= 50(2*1+99*1)
=50 *101=5050
therefore , sn=n/2(2a +(n-1)d)
s100= 50(2*1+99*1)
=50 *101=5050
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