CBSEi Class 10 Sequences (AP and GP) CORE
CBSEi Class 10 Sequences (AP and GP) CORE
CBSEi Class 10 Sequences (AP and GP) CORE
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3. Find the sum of first n odd natural numbers.<br />
First n odd natural numbers are : ………….<br />
First term =………..<br />
Common difference=………….<br />
4. Find the sum of 20 terms of the A.P. -5, 0, 5, <strong>10</strong> …<br />
First term = ……..<br />
Common difference =………<br />
Formula used =…………….<br />
5. In an A.P. if the 5 th <strong>and</strong> 12 th terms are 30 <strong>and</strong> 65 respectively, find the sum of first<br />
25 terms.<br />
a5 = ……….<br />
a12 = ………..<br />
How will you find a <strong>and</strong> d?<br />
115
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