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How many terms of the sequence -14, -11, -8,…so on, to make a sum of 1122 ?
Read Solution (Total 4)
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- Its an arithmetic progression,
where first term being -14 and the difference being 3.
we also have the total sum that is 1122
therefore by using sum to n terms formula,
Sn=n/2[2a+(n-1)d]
1122=n/2[2(-14)+(n-1)3]
after simplifying we get n=33 - 6 years agoHelpfull: Yes(4) No(1)
- it is in ap
the sum is already given as 1122
and the difference is 3
1122=n/2 *(2(-14)+(n-1)3)
2244=n(-28+3n-3)
n=33 - 6 years agoHelpfull: Yes(1) No(2)
- Its in AP:
so, a=-14
d=+3
sum=1122
then,
1122=n*(2*a+(n-1)*d)/2
that gives n=33. - 6 years agoHelpfull: Yes(0) No(0)
- Given,sum=1122
let's first no. of the sequence be a and no. of terms of the sequence be n and common difference of the sequence be d
a=-14
d=3
Formula:
Sum=n/2[2a+(n-1)d]
n=33 ans. - 6 years agoHelpfull: Yes(0) No(0)
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