Please answer 1st question 4G 0.0KB/s e ail 2 Vo 5:37 PM PROGRESSIO... ak = 2ak-1 -

Please answer 1st question

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4G 0.0KB/s e ail 2 Vo 5:37 PM PROGRESSIO... ak = 2ak-1 - ar-2 = a,a2.,a, are in A.P. %3D af taž +..+a_ I la² +35x1 1d² +10ad = 90 %3D 11 11 225 + 35d + 150d = 90 35d + 150d + 135 0 = -3, -9/7 27 az <, we get d = -3 and d = -9/7 2 Given 11 =(30-10x3] = 0 2 11 PRACTICE PROBLEMS 1. Ifa, b,c, and d'are in H.P., then prove that (b +c + d)la, (c + d + a)/b, (d +a + b)lc, and (a +b + c)ld, are in A.P. 2. IS p arithmetic means are inserted between 5 and 41 so that the ratio Ap-l then find the value of p. 2.ANS:p=11 3. If n A.M's are inserted between 2 and 38 then the sum of resulting series is 200.Find the value of n. 3.ANS:8 4. If n arithmetic means are inserted between 2 and 38, then the sum of the resulting series is obtained as 200. Then find the valuc of n. 4.ANS:8 V Edit with WPS Office Scanned with CamScanner 4G 0.0KB/s e ail 2 Vo 5:37 PM PROGRESSIO... ak = 2ak-1 - ar-2 = a,a2.,a, are in A.P. %3D af taž +..+a_ I la² +35x1 1d² +10ad = 90 %3D 11 11 225 + 35d + 150d = 90 35d + 150d + 135 0 = -3, -9/7 27 az <, we get d = -3 and d = -9/7 2 Given 11 =(30-10x3] = 0 2 11 PRACTICE PROBLEMS 1. Ifa, b,c, and d'are in H.P., then prove that (b +c + d)la, (c + d + a)/b, (d +a + b)lc, and (a +b + c)ld, are in A.P. 2. IS p arithmetic means are inserted between 5 and 41 so that the ratio Ap-l then find the value of p. 2.ANS:p=11 3. If n A.M's are inserted between 2 and 38 then the sum of resulting series is 200.Find the value of n. 3.ANS:8 4. If n arithmetic means are inserted between 2 and 38, then the sum of the resulting series is obtained as 200. Then find the valuc of n. 4.ANS:8 V Edit with WPS Office Scanned with CamScanner