# Math

The sum of the 4th and 6th terms of an AP is 42. The sum of the 3rd and the 9th term of progression is 52, find the first term and the common difference of the sum of the 1st, 10th terms of the progression

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2. "The sum of the 4th and 6th terms of an AP is 42"
---> a+3d + a+5d = 42
2a + 8d = 4s
a + 4d = 21
"The sum of the 3rd and the 9th term of progression is 52"
a+2d + a+8d = 52
2a + 10d = 52
a + 5d = 26

solve these two equations by subtracting them
etc

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3. Thanks a lot

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