Assertion: sequence's term | /r/CapableOf | end term
Facets:
Source sentences:
text: a=first term, a[n]=nth term (ending term which is the 20th term), and n is the number of terms
text: a=first term, a[n]=nth term (ending term which is the 30th term), and n is the number of terms
text: the 101st term is 201c)Using the sum of arithmetic series formula:a=first term, a[n]=nth term (ending term which is the 20th term), and
text: n is the number of termsPlug in valuesSimplifySo the sum of the first 20 terms is 400.d)Again using the same formulaa=first term, a[n]=nth term (ending term which is the 30th term), and n is the number of termsPlug in valuesSimplifye)Sum of the first 2 terms1+3=4Sum of the first 3 terms1+3+5=9Sum of the first 4 terms1+3+5+7=16Sum of the first 5 terms1+3+5+7+9=25Sum of the first 6 terms1+3+5+7+9+11=36Sum of the first 7 terms1+3+5+7+9+11+13=49Sum of the first 8 terms1+3+5+7+9+11+13+15=64Sum of the first 9 terms1+3+5+7+9+11+13+15+17=81Sum of the first 10 terms1+3+5+7+9+11+13+15+17+19=100Notice how the partial sums are all perfect squares.