find the sum of the following without actual multiplication: 1+3+5+7+9+11+13+15+17
Answers
Answered by
1
no. of terms= 9
so the square of 9 is 81
then the plus of all the terms is 81
hope its help you
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Answered by
1
Step-by-step explanation:
we can calculate by formula of sum of series
sum =
here n=9
a=1
d=2
sum=(9/2)(2+(8*2))
sum=(9/2)*18=9*9=81
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