How in the world do you find the explicit formula for 2, -4, 6, -8, 10?
It has to be an exponent because the numbers' charges are changing in a pattern.... But I can't figure out this formula!
It has to be an exponent because the numbers' charges are changing in a pattern.... But I can't figure out this formula!
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If A(1) = 2, then A(n) = (2*n)*(-1)^(n + 1) <<<