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Find the 20th term from thè last elll U18. The sum of the 4th and 8th terms of an AP is 24 and the sum of tne oth and 10th terms is44. Find the fist thĹee terms of the AFPIgolany of 5000 and received an increment |
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Answer» a4+a8=24a+3d+a+7d=242a+10d=24. .........1 a6+a10=34a+5d+a+9d=342a+14d=34. .,.......2Subtracting 2 from 12a+14d=342a+10d=24- - -4d=10d=4/10or 2/5Put d= 2/5 in 12a+10×2/5=242a+4=242a=24-42a=20a=10 |
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