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Free_Kalibri [48]
3 years ago
13

Find the 7th term of the arithmetic sequence 5x + 9, 8x + 5, 11x + 1,...

Mathematics
1 answer:
ohaa [14]3 years ago
4 0

Answer:

<h2>           \bold{a_7=33x-15}</h2>

Step-by-step explanation:

In arithmetic sequence:  a₂ - a₁ = a₃ - a₂     {common difference}

a_1=5x+9\\a_2=8x+5\\a_3=11x+1\\\\\\d=8x+5-(5x+9)=8x+5-5x-9=3x-4\\\\a_n=a_1+d(n-1)\\\\a_7=5x+9+(3x-4)\cdot6\\\\a_7=5x+9+18x-24\\\\a_7=33x-15

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Answer:

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Step-by-step explanation:

Let x denotes the required number that satisfies the following condition.

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