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Find the first term and the number of te...

Find the first term and the number of terms in an AP is
the 4th,16th, and last terms are 36,0 and -42, respectively

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The correct Answer is:
`a=45,d=-3,n=30`
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CENGAGE-PROGRESSIONS -TEST YOURSELF (Level 2)
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  4. Sum the following series : 1+4+7+ . . . to 40 terms

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

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  9. Examine whether the following form a geometric progression. If so, fin...

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  11. Find the 8th term of the series -1//3,1//2,-3//4, . . .

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  12. Find the 5th and 8th terms of the series 3,6,12, . . .

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

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

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

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

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  19. Write the nth term and the term indicated against each case : 2,1 3/...

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