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19. Arithmetic Progressions
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Q3 of 167 Page 19

Find the four numbers in A.P., whose sum is 50 and in which the greatest number is 4 times the least.

Given: Sum of four terms is 50


To find: first four terms of AP


Assume these four terms are a - 2d, a - d, a + d, a + 2d


Sum of these terms is 4a = 50



It is also given that the greatest number is 4 time the least


a + 2d = 4(a - 2d)


3a = 10d



Substituting



Hence the terms of AP are a - d, a, a + d which is


More from this chapter

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1

The Sum of the three terms of an A.P. is 21 and the product of the first, and the third terms exceed the second term by 6, find three terms

2

Three numbers are in A.P. If the sum of these numbers be 27 and the product 648, find the numbers

4

The sum of three numbers in A.P. is 12, and the sum of their cubes is 288. Find the numbers.

5

If the sum of three numbers in A.P. is 24 and their product is 440, find the numbers.

Questions · 167
19. Arithmetic Progressions
1 2 3 4 4 4 5 6 6 6 6 7 8 1 1 1 2 3 3 3 4 4 5 5 6 6 7 8 9 10 11 12 13 14 15 15 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 1 1 1 1 1 1 1 2 2 2 3 4 5 6 7 8 9 10 11 12 13 14 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 1 1 2 3 4 4 5 5 5 6 7 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
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