Oblicz sumę ciągu 1+3+5+7+...+201
a1=1
r=3-1=2
an=a1+(n-1)r
1+2n-2=201
2n=201+1
2n=202
n=202/2
n=101
Sn=(a1+an)/2 *n
S101=(1+201)/2 *101=101*101=10 201
Zdaanie w załączniku
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a1=1
r=3-1=2
an=a1+(n-1)r
1+2n-2=201
2n=201+1
2n=202
n=202/2
n=101
Sn=(a1+an)/2 *n
S101=(1+201)/2 *101=101*101=10 201
Zdaanie w załączniku
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