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Arithmetic Progressions

Question 16:

Determine the A.P. whose third term is 16 and the 7th term exceeds the 5th term by 12.

Answer:

=a3 = 16

a + (3 − 1) d = 16

a + 2d = 16 (1)

a7a5 = 12

[a+ (7 − 1) d] − [a + (5 − 1...

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