King Lane
09/14/2023 · Senior High School
The first, second and fourth term of a given sequence are \( 11-x, 2 x+1 \) and \( 3 x+1 \). [ 3 marks ] a) Calculate the value of \( x \). [ 4 marks ] b) Find the sum of the first twelve terms of the sequence. [ 2 marks ]
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a) The value of \( x \) is 5.
b) The sum of the first twelve terms of the sequence is 402.
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