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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, 04:40: PM
answered-by-expert Expert Answer
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
Answered by Arun | 25 May, 2019, 08:00: PM

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CBSE 10 - Maths
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CBSE 10 - Maths
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CBSE 10 - Maths
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CBSE 10 - Maths
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