CBSE Class 10 Answered
The 19th term of an A.P is equal to three times it's sixth term.if it's 9th term is 19 find the A.P. ?
Asked by Reena7828834 | 25 May, 2019, 16:40: PM
![straight t subscript 19 equals 3 straight t subscript 6
straight a plus open parentheses 19 minus 1 close parentheses straight d equals 3 straight a plus 3 open parentheses 6 minus 1 close parentheses straight d
straight a plus 18 straight d equals 3 straight a plus 15 straight d
2 straight a minus 3 straight d equals 0... left parenthesis 1 right parenthesis
straight t subscript 9 equals 19
straight a plus 8 straight d equals 19.... left parenthesis 2 right parenthesis
left parenthesis 1 right parenthesis minus 2 left parenthesis 2 right parenthesis
straight d equals 2
straight a equals 3](https://images.topperlearning.com/topper/tinymce/cache/8180ee2d494955ef42a41cd839226aec.png)
Answered by Arun | 25 May, 2019, 20:00: PM
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