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CBSEi Class 10 Sequences (AP and GP) CORE

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Activity 16 – Content (CW11)<br />

Problems on Sum of First n Terms of an A.P<br />

Specific objective: To apply the formula for finding the sum of first n terms of an<br />

A.P<br />

Description: Through this activity sheet students will be exposed to problems<br />

involving the use of formula in finding the sum of first n terms of an A.P<br />

Execution: Discuss the various ways of finding the sum of n terms of an A.P. Ask<br />

the students to solve the problems given in the worksheet. Discuss the ways of<br />

solving the problems.<br />

Parameters for assessment:<br />

Able to find the sum of first n terms of an A.P. when first term <strong>and</strong> common<br />

difference is given.<br />

Able to find the sum of first n terms of an A.P. when first term, second term<br />

<strong>and</strong> last term is given.<br />

Able to find the sum of first n terms of an A.P. when any two of its terms are<br />

given.<br />

Able to find the sum of first n terms of an A.P. under given condition.<br />

Extra reading: http://mathguru.com/level2/arithmetic-progressions-<br />

2007<strong>10</strong>160001<strong>10</strong>22.aspx<br />

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