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Example 15: Find the sum of first 24 terms of the list of numbers whose nth term isgiven by |
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Answer» The nth term is an=3+2n so by using this we can find the value of terms like a1=5,a2=7,a3=9and a24=51now the first term is 5 and the last term is 51 and the difference is 2by using the formula for sum of n terms i. esn =n/2(2a+(n-1)d)so s24=24/2(10+23*2) i. e 672 ans. |
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