(three / five)^x+ three ∙(three / five)^(x- one)≥ thirty-three / five -(three / five)^(x+ one)
(3 divide by 5) to the power of x plus 3∙(3 divide by 5) to the power of (x minus 1)≥33 divide by 5 minus (3 divide by 5) to the power of (x plus 1)
(three divide by five) to the power of x plus three ∙(three divide by five) to the power of (x minus one)≥ thirty minus three divide by five minus (three divide by five) to the power of (x plus one)
(3/5)x+3∙(3/5)(x-1)≥33/5-(3/5)(x+1)
3/5x+3∙3/5x-1≥33/5-3/5x+1
3/5^x+3∙3/5^x-1≥33/5-3/5^x+1
(3 divide by 5)^x+3∙(3 divide by 5)^(x-1)≥33 divide by 5-(3 divide by 5)^(x+1)