In an arithmetic sequence, the first term, a1, is equal to 3 , and the fourth term, a4, is equal to 24 . Which number represents the common difference of the arithmetic sequence?d=4d=5d=6d=7
Q. In an arithmetic sequence, the first term, a1, is equal to 3 , and the fourth term, a4, is equal to 24 . Which number represents the common difference of the arithmetic sequence?d=4d=5d=6d=7
Given terms: We are given the first term of the arithmetic sequence a1 is 3 and the fourth term a4 is 24. The common difference d can be found by using the formula for the nth term of an arithmetic sequence, which is an=a1+(n−1)d. We can set up the equation for the fourth term.
Set up equation: Substitute the known values into the formula to find the common difference. We have a4=24, a1=3, and n=4. So, 24=3+(4−1)d.
Simplify equation: Simplify the equation: 24=3+3d. Subtract 3 from both sides to isolate the term with d: 24−3=3d.
Isolate term: Perform the subtraction: 21=3d. Now, divide both sides by 3 to solve for d: 21÷3=d.
Calculate common difference: Calculate the division: 7=d. So, the common difference of the arithmetic sequence is 7.
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