The sixth term of the arithmetic progression is 17, the difference is 5. Find the fifth term of this progression.
| July 31, 2021 | education
Let us write in the form of a formula the ratio between the fifth and sixth terms of the arithmetic progression in terms of its difference d.
a6 = a5 + d.
Substitute the numbers known from the condition and solve the resulting equation for a5.
17 = a5 + 5;
a5 = 17 – 5 = 12.
Answer: a5 = 12.
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