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Reply With Quotecan we do this without knowing what kind of sequence is this?
If the terms of a sequence are t1, t2, t3, . . . , tn, what is the value of n?
(1) The sum of the n terms is 3,124.
(2) The average (arithmetic mean) of the n terms is 4.
can we do this without knowing what kind of sequence is this?
nothing is mentioned r the consecutive , r they in GP /AP etc...
any idea how to solve?
from (1) the sum of numbers is 3124
from (2) the sum of numbers is 4n since the arithmetic mean is (t1+t2+...+tn)/n=4.
from both (1) and (2) .... we can get the value of n by equating the sum of numbers.
therefore 4n=3124
n=781
we don't have to bother about the type of series .. we just need to calculate the value of n... by using the given data.
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