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Sum the following series : 1+4+7+ . . ...

Sum the following series :
`1+4+7+ . . .` to 40 terms

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The correct Answer is:
`S_(40)=2380`
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CENGAGE-PROGRESSIONS -TEST YOURSELF (Level 2)
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  3. Sum the following series : 1+4+7+ . . . to 40 terms

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  4. Sum the following series : -4+4+12+ . . . to 20 terms

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  12. Find the 10th and 16th terms of the series 256,128, 64, . . .

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  13. Which one of the following is in HP ? 1,1/4,1/7,1/10

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  14. Which one of the following is in HP ? 1/3,1/6,1/12,1/24

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  15. Which one of the following is in HP ? 2,1/2,1/7,1/5

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  16. Write the nth term and the term indicated against each case : 1/a,(1...

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  17. Write the nth term and the term indicated against each case : 4/7,12...

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