Question

If the seventh term of an AP is 1/9 and it's ninth term is 1/7 find it's 63th term

Answer 1

hiiii..this is your answer ...hope you got help

Answer 2

$\frac{1}{9} = a + 6d \\ \frac{1}{7} = a + 8d \\ \frac{1}{9} - \frac{1}{7} = 6d - 8d \\ \frac{ - 2}{63} = - 2d \\ d = \frac{1}{63} \\ a = \frac{1}{9} - 6 \times \frac{1}{63} \\ a = \frac{7 - 6}{63} = \frac{ 1}{63} \\ a63 = a + 62d = \frac{ 1}{63} + \frac{62}{63} \\ \: \: \: \: \: \: \: \: = \frac{63}{63}$
=1