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Ex 5.2, 10 - Chapter 5 Class 10 Arithmetic Progressions
Last updated at Dec. 8, 2016 by Teachoo
Transcript
Ex 5.2 ,10 If 17th term of an A.P. exceeds its 10th term by 7. Find the common difference. We know that an = a + (n 1) d So, a17 = a + (17 1) d a17 = a + 16d Also, a10 = a + (10 1)d a10 = a + 9d Given that 17th term of an A.P. exceeds its 10th term by 7 a17 a10 = 7 (a + 16d) (a + 9d) = 7 a + 16d a 9d = 7 a a + 16d 9d = 7 0 + 7d = 7 7d = 7 7d = 7 d = 7/7 d = 1 Therefore, common difference of the given AP is 1
Chapter 5 Class 10 Arithmetic Progressions
Serial order wise
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