the 35 th partial sum of the arithematic sequence with term an =n/2+1
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350
Step-by-step explanation:
here
an=n/2+1
a1=1/2+1=3/2
a35=35/2+1=37/2
S35=n/2[a+l]
S35=35/2[3/2+37/2]
S35=35/2[20]
S35=350
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