what the answer D={1, 4, 9,...100}
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what we have to find if sum, then the answer is Step-by-step explanation:
Sn=n/2[a+l] an=a+(n-1)d
Sn=n/2[1+100] 100=1+(n-1)3
S34 =34/2(101) 100=1+3n-3
S34=17*101 n= 102/3
n=34
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