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Scorpion4ik [409]
3 years ago
6

Find an explicit formula for the arithmetic sequence -5,13,31,49,

Mathematics
1 answer:
olasank [31]3 years ago
4 0
The common difference dividing each term from the next is 18.

Then a(n) = -5 + (n-1)(18)

Check:  find a(1) using this formula.  Is a(1) = -5?  a(1) = -5 + (1-1)(18) does equal -5.

Find a(2);     a(2) = -5 + (2-1)(18) = -5 + 18 = 13.  Correct.
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Please help! Thank youuuu!
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F(x) = 3x² + 6x - 1

The graph is a parabola open upward (a= 3>0) with a minimum.

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