• Asignatura: Matemáticas
  • Autor: luisfergonzalezohg
  • hace 8 años

3x+4>2x+7 EXPRESAR LA RESOUESTA GRÁFICAMENTE MEDIANTE INTERVALOS. ​

Respuestas

Respuesta dada por: Rohtak
0

You have to make a list of x and y values.

1) For your first equation (y = 43x) you will have

x 0 1/3 1/2 1

y 1 4 8 64

Since 43x = 8 your anwerr is x = 1/2. For the right side y = 8 - horizontal line intersecting y=43x

at x = 1/2.

2) The same way, for the second equation you can make a chart

x 0 1/4 1/2 1

y 1 2 4 16

Since the right side is y =7, function y = 42x will intersect y = 7 line at 1/2 < x <1. If you solve it analytivally (by taking logarithms) you will find that in this case x = 0.702 (x = ln7/2ln4). Use the numbers shown to sketch the graph to make sure that x = 0.702.

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