Identify a3 of this sequence: 0.25, 0.5, 0.75, 1, 1.25, 1.=

This is an arithmetic sequence ( the difference is constant - d ).
a 1 = 0.25,  a 2 = 0.5,  a 3 = 0.75, a 4 = 1,...
a n = a 1 + ( n - 1 ) d
So:  a 1 = 0.25 and d = 0.25
a 3 = 0.25 + ( 3 - 1 ) * 0.25 = 0.25 + 2 * 0.25 = 0.25 + 0.50 = 0.75

a 3 = 0.75

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step-by-step explanation:

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