4. The sum of how many terms of the A.P. 10, 12, 14, ... will be 190
Answers
Answered by
34
Given ,
First term = 10
Common difference = 12 - 10 = 2
Sn = 190
We know that ,
Hence , the required value of n is 10
Answered by
10
Given that :
Sum(sn)=190,
we know:
From above A.P. it's evident that:
Now let's put this values into formula:
Now, transpose all terms on one side:
Divide both the side by 2 we get;.
Since,for the number of terms negative are negotiable
therefore,
So,
sum of first10 term of A.P.=190
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