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Determine the A.p whose third term …

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Determine the A.p whose third term is 5 and the 7th term is 9

Posted by Chetan Pal 7 years, 2 months ago

CBSE > Class 10 > Mathematics

3 answers

Yogita Ingle 7 years, 2 months ago

a₃ = a + (3 – 1)d = a + 2d = 5 ... (1)

a₇ = a + (7 – 1)d = a + 6d = 9 ... (2)

Solving the pair of linear equations (1) and (2),
a = 3, d = 1
Hence, the required AP is 3, 4, 5, 6, 7, ...

0Thank You

Dad'S Angel? 7 years, 2 months ago

Ap is 3,4,5,6,7........

2Thank You

Gurjar Kabir (बैंसला) 7 years, 2 months ago

2,3,4,5,6,7..... .

1Thank You

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