Mathematics for IGCSE & O level - Sequences (Section 1 - No. 11) | ExamPlay

Mathematics for IGCSE & O level - Sequences (Section 1 - No. 11)

If the third term of a sequence is 10 and the common difference is 3, what is the first term?

1

3

4

7

解释

a + 2d = 10; a + 2(3) = 10; a = 4

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