65. Exemplar exercise problem XXV

1. The \(26^{th}\), \(11^{th}\) and the last term of an AP are \(0\), \(3\) and \(\frac{1}{–5}\), respectively. Find the common difference and the number of terms.

 

 

 

2. Find the \(20^{th}\) term of the AP whose \(7^{th}\) term is \(24\) less than the \(11^{th}\) term, first term being \(12\).