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The ratio of 7th and 3rd term of an AP is 12:5 Find the ratio of 13th to the 4th term |
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Answer» Answer: 10:3 Step-by-step explanation: Formula of N th TERM in AP = a+(n-1)d Where a is the first term n is the term number d is the common ratio Now when n = 7 So,a+(7-1)d=a+6d When n = 3 So, a+(3-1)d=a+2d Since we are given that the ratio of 7TH to 3rd term of an AP is 12:5 ⇒ ⇒5a+30d=12a+24d ⇒6d = 7a ⇒a=6d/7 Now 13TH term =a+(13-1)d =a+12d = 4th term =a+(4-1)d =a+3d = Now ratio of 13th and 4th term JAI SHREE KRISHNA |
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