Photo AI

Figure 1 shows the graph of $y = f(x)$, $-5 \leq x \leq 5$ - Edexcel - A-Level Maths Pure - Question 2 - 2006 - Paper 5

Question icon

Question 2

Figure-1-shows-the-graph-of-$y-=-f(x)$,-$-5-\leq-x-\leq-5$-Edexcel-A-Level Maths Pure-Question 2-2006-Paper 5.png

Figure 1 shows the graph of $y = f(x)$, $-5 \leq x \leq 5$. The point M(2, 4) is the maximum turning point of the graph. Sketch, on separate diagrams, the graphs o... show full transcript

Worked Solution & Example Answer:Figure 1 shows the graph of $y = f(x)$, $-5 \leq x \leq 5$ - Edexcel - A-Level Maths Pure - Question 2 - 2006 - Paper 5

Step 1

Sketch the graph of $y = f(x) + 3$

96%

114 rated

Answer

To sketch this graph, we take the original graph of f(x)f(x) and translate it vertically upwards by 3 units. The maximum turning point M(2, 4) on the original graph shifts to M'(2, 7). The rest of the graph follows the same shape as the original but is elevated by 3 units. Thus, the new graph should still reflect the general shape and progression of the original function.

Step 2

Sketch the graph of $y = |f(x)|$

99%

104 rated

Answer

For this graph, we take the absolute value of the function f(x)f(x). Any segments of the graph that fall below the x-axis will be reflected above the x-axis. The maximum turning point M(2, 4) remains the maximum point. Find points where f(x)f(x) is negative and replace their yy values with their absolute values. Ensure any local minima below the x-axis are accurately reflected above.

Step 3

Sketch the graph of $y = g(|x|)$

96%

101 rated

Answer

The function g(x)=ex2g(x) = e^{x^2} is even, meaning g(x)=g(x)g(-x) = g(x). Therefore, we only need to graph for x0x \geq 0 and then reflect that section across the y-axis. For x=0x = 0, g(0)=e0=1g(0) = e^0 = 1. As xx increases, g(x)g(x) also increases rapidly due to the ex2e^{x^2} term. The turning point at x=2x = 2 in the original function translates into the new graph symmetrically.

Step 4

Show maximum turning points

98%

120 rated

Answer

In the graph of y=f(x)+3y = f(x)+3, the maximum turning point is M'(2, 7). For y=f(x)y = |f(x)|, the maximum turning point remains at M(2, 4) as it is above the x-axis. In the case of y=g(x)y = g(|x|), since the graph is symmetric about the y-axis and the turning point is evaluated at x=2x = 2, the points M(2, e4e^{4}) and M(-2, e4e^{4}) can be noted where the graph changes direction.

Join the A-Level students using SimpleStudy...

97% of Students

Report Improved Results

98% of Students

Recommend to friends

100,000+

Students Supported

1 Million+

Questions answered

;