Help me with this please

What is the rescursive formula for this geometric sequence? 7, -14, 28, -56

Plz me i need i will give a brain

5× 1/2 = ? a) more than 5 because you are multiplying by a whole number b) 5/10 because you multiply the numerator and denominator by 5 c) less than 5 because you are multiplying by a number that is more than 1 d) less than 5 because you are multiplying by a number that is less than 1