Bunuel wrote:
In a sequence S, each term after the second term is 3 less than preceding term, If the sum of first five terms is 57, what is the first term?
(1) Sum of first 4 terms is 51
(2) First term is 3 more than the thirdterm
Let the first term be 'F'
&
Let the second term be 'S'
Now according to the question: series from second term is S , S-3 , S-3(2) ...
So sum of first five terms will be F + S + S-3 + S-6 + S-9 = 57
F+4S-18 = 57
F+4S = 75. |eq1
We are having two variables and one equation,
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