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If the second term of ap …

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If the second term of ap is 8 and 5th term is 17. find its 19th term.

Posted by Subham Gupta 7 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Gourav Kumar 7 years, 4 months ago

Case 1, A+(2-1)d=8 A+d=8........(1) Case 2, A+(5-1)d=17 A+4d=17........ (2) By subtracting eq(1)from eq (2) we get, D=3 Putting value in eq1or2we get, A=5 n19th term =a+(19-1)d =5+(18×3) =5+54 =59 àńś@@

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CBSE > Class 10 > Mathematics