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CBSE Class 10 Answered

if the ratio between 5th and the 10th terms of an AP is 1:2 and 12th term is 36,find that AP
Asked by mohammedrushansaif | 08 Jan, 2019, 10:14: AM
answered-by-expert Expert Answer
begin mathsize 18px style straight t subscript 5 over straight t subscript 10 equals 1 half fraction numerator begin display style straight a plus 4 straight d end style over denominator begin display style straight a plus 9 straight d end style end fraction equals fraction numerator begin display style 1 end style over denominator begin display style 2 end style end fraction 2 straight a plus 8 straight d equals straight a plus 9 straight d straight a equals straight d straight t subscript 12 equals 36 straight a plus 11 straight d equals 36 12 straight a equals 36 straight a equals 3 straight d equals 3 AP space is space 3 comma 6 comma 9 comma 12 comma 15..... end style
Answered by Arun | 08 Jan, 2019, 10:50: AM

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CBSE 10 - Maths
1.The mean weight of 9 students is 25 Kg. if one more student is joined in the group, the mean is unaltered. Find the weight of 10th student 2.If the nth term of an A.P is pn+q find its common difference.
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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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Asked by Shirlythomas1332 | 20 Mar, 2021, 10:11: AM
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