Look for a pattern in the first three equations. then, fill in the missing numbers in the rest of the series of equations. 1= 1 · 2⁄2 1 + 2 = 2 · 3⁄2 1 + 2 + 3 = 3 · 4⁄2 1 + 2 + 3 + ? = ? · ? ⁄? 1 + 2 + 3 + ? + ? = ? · ? ⁄?

Step-by-step explanation:

The given equation are

As you can observe, the left side of equation has a sum which increases by one. The right side of the equation has a product between a number and a fraction, the number increases 1 unit, and the numerator of the fraction also increases 1 unit, but the denominator remains the same.

Applying this patterns, the third and fourth equation are

Therefore, the two last equation completed are

you answer is a

step-by-step explanation: