exam Maths Puzzle Numerical Ability

Find the sum of a geometric series for which a1 = 48, an = 3, and r = -1/2: *

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exam Other Question

CAN SOMEONE PLEASE HELP ME WITH THIS PROBLEM:

Which of the folling is a sixth order equation?

1. S(x) = x^5 + x^6 - 2x +7
2. Q(x) = x^2 + 3^6
3. M(x) = (x^3)^3 - 12x + 4
4. None of the above
2x+3y=6 (for x) linear equation

Hints:
Isolate x on one side of the equals sign.
Your answer will be a formula, not a number.