exam Maths Puzzle Numerical Ability

3x9+8-8/16+(-4^2)

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exam Other Question

What is the explicit formula for the sequence?

3, 6, 12, 24, ...
a. an = 3*2^(n-1)
b. an = 2*3^(n-1)
c. an = 3*-2^(n-1)
d. an = 3^(n-1) Find the equation of the line parallel passing through 3x+y=7. x=2;y=1 3/4