Find the value of each of the following without actual addition. (a) 1+3+5+7+9+11+13+....+41
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Answered by
1
Answer:
We have to find the sum of above series without actual addition
The given series is 1+3+5+7+9+11+13+15+17
The series is in the form of AP with a=1, d=2 and n=50 and last term l=17
Sum of series = n2∗ (a + l)
= 9/2 ∗ (1+17)
= 4.5*18
=81
Therefore, answer: - the sum 1+3+5+7+9+11+13+15+17 is 81.
Step-by-step explanation:
it will be helpful
Answered by
0
Answer:
here n=21
Step-by-step explanation:
answer is 441
n=41+1=42
then
=42÷2=21
21×21
441
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