alleryIn the sequence 11, 7, 3, the common difference is:
A-4
B+4
C-7
D+7
Answer & Solution
Correct answer: A. -4
1. The terms are getting smaller, so d is negative.
2. 7 minus 11 is minus 4.
3. The first term is 11 and the common difference is minus 4.
4. So the answer is -4.
_Source: syllabus Mathematics, Ch 8 'Predicting What Comes Next: Exploring Sequences and Progressions'_
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