In an AP of 99 terms ,the sum of all the odd numbered terms is 2550. Them find the sum of all the 99 terms of the AP.
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Answered by
35
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sprao534:
add numbered terms are 1,3,5.......... 99. let the number of terms be n. 99=1+(n-1)2 then n=50
how can u say the numbers are 1 to 99 ??
take the 99 terms be : 51 to 149.
consider 51 th term as first term. 149th term as 99th term. there fore number of odd terms are 50
remember, the series contains 99 terms
ok 51 to 150
the series contains only 99 terms. How can you take 50 to 149 or 51 to 150
there are 99 terms in them
it is not written the first 99 terms
In an A. P of 99 terms means?
Answered by
7
Answer:5049
Step-by-step explanation
SN =n/2 (2a+ (n-1) d)
2550 = 50/2 (a1 + a99 )
a1 + a99 = 102
Now the sum of all terms is
99/2 ( a1+ a99) = 99/2 (102)
=5049
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