To find the first four terms of the sequence given by the formula aₙ=43-4(n-1), we substitute n=1, 2, 3, and 4 in the formula and simplify.
a₁=43-4(1-1)=43-4(0)=43-0=43
a₂=43-4(2-1)=43-4(1)=39
a₃=43-4(3-1)=43-4(2)=35
a₄=43-4(4-1)=43-4(3)=31
Therefore, the first four terms of the sequence are 43, 39, 35, and 31