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Mathematics
Algebra
Sequences
Find the sum of the first 40 terms of the arithmetic sequence: 13, 19, 25, 31, ...
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5210
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in an arithmetic sequence whose first term is 4, the 1st, 3rd and 7th terms form consecutive terms of geometric sequence, find
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a + a+d + a+2d = 3 a + 3 d = 3(a+d)=12+3d firat = 4 third = 4+2d 7th = 4+6d r and the geometric is
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in an arithmetic sequence the common difference is equal to 2.the first term is also the first term of a geometric sequence. the
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first term: a common difference = 2 sum of first 3 terms = a + a+d + a+2d = 3a + 6 sum of first 9
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In an arithmetic sequence the sum of the first ten terms is 400 and the sum of next ten terms is 1000. Find
The common difference
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To find the common difference and the first term in the arithmetic sequence, we can use the formulas
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The 1st, 5th and 13th terms of an arithmetic sequence are the first three terms of a geometric sequence with a common ratio 2.
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My answer is 12276, is this correct?
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the sum of the first nine terms of an arithmetic sequence 216. The 1st, 3rd and 7th terms form the first three terms of a
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9/2 (2a+8d) = 216 (a+2d)/a = (1+6d)/(a+2d) One choice is 24, 24, 24, ... Probably not what you want.
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Find the no. of terms
1. 3,5,7...33 2.-5,-1,3,...75 Solve each problem. 1. In the Arithmetic sequence 5,8,11,14.... what is n if
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1. term(n) = a+(n-1)d you have a = 3, d = 2 , n = ?? 33 = 3 + (n-1)(2) 30 = 2n - 2 28 = 2n n = 14
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1) Given the terms a35 = 1238 and a70 = 1483 of an Arithmetic. Find the exact value of the term a105 a sequence and sum of
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1. a+ 34d = 1238 a+69d = 1483 subtract them 35d = 245 d = 7 then in the 1st equation: a + 238 = 1238
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1)The sum of 6 terms of an arithmetic series is 45, the sum of 12 terms is -8. Find the first term and the common difference?
2)I
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You have to know the formula for the sum of n terms of an AS Sum(6) = 3(2a + 5d) 6a + 15d = 45 ---
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The 1st,5th,13th term of an arithmetic sequence are the first 3 terms of geometric sequence with a common ratio of 2. If the
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Why don't we call the first term of the arithmetic sequence "a" and the common difference "d"? That
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Use the arithmetic sequence nth term formula to solve the following problem:
The first, second, and the nth terms of an
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the common difference is ... 6 - 2 the change from 6 to 58 is ... 58 - 6 the number of terms from 6
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