How many terms of the series 2+6+18....... must be taken to make sum equal to 728?
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Answered by
8
the sum of 2 ,6and 18 is .......
2+6+18=26.
So,according to question,
26+x=728.
x=728-26
x=702.
So, the 702 must be taken.
Buddy follow me,that enable to ,if you ask any question then it nodification recieved by me.
2+6+18=26.
So,according to question,
26+x=728.
x=728-26
x=702.
So, the 702 must be taken.
Buddy follow me,that enable to ,if you ask any question then it nodification recieved by me.
Answered by
15
sum of n terns in G.P where r greater than equal to one is Sn=a(r^n-1)÷(r-1)
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