Find the number of terms of the AP 18, 3...

Find the number of terms of the AP `18, 31/2, 13, ....., -99/2` and find the sum of all its terms.

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X BOARDS|Exercise SECTION-D 39 (b)|1 Videos

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Find the number of terms in the A.P. 7, 10, 13, .........., 31.

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Find the number of terms in the following A.P. : 18, 15(1)/(2), 13 .. -47 .

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Find the number of terms in each of the following A.P.s : 18,15 1/2 , 13 , …….. -47

if the sum of certain number of terms of the AP 27,24,21,18,…., is -30 . Find the last term.

Find the sum of the AP 13,15,17…..99:

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