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secondary 2 | Maths
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Date Posted: 1 year ago
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Date Posted:
1 year ago
I do not understand part (a)
Looking at the formula (an^2 +bn) and sequence (5,9,13,17) given
Using formula: when n= 2,
Sum of first two numbers
= a(2)^2 + b(2) = 4a +2b
Using the sequence given (5,9,13,17)
The sum of first two numbers
= 5+9 = 14
They both represent the sum of first two numbers of the sequence. Hence, 4a + 2b = 14 (shown).
Using formula: when n= 2,
Sum of first two numbers
= a(2)^2 + b(2) = 4a +2b
Using the sequence given (5,9,13,17)
The sum of first two numbers
= 5+9 = 14
They both represent the sum of first two numbers of the sequence. Hence, 4a + 2b = 14 (shown).
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