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01-10-2018
Mathematics

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The first term of an arithmetic sequence is -3 and the fifteenth term is 53 what is the common difference of the sequence

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06-10-2018

Solution

The 1st term = -3

15th term = 53

15th term = a + d(n-1)

53 = -3 + d(15- 1) [Here n = 15)

53 + 3 = d(14)

14d = 56

d = 4

The common difference is 4.

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