Which of the following functions has the largest value when x = 4?

e (x) = x2 + 6x + 21

m (x) = 8x

v (x) = 31x

e (x)

v (x)

m (x)

All the functions are equal at x = 4.

Answer:The function v (x) has the largest value when x = 4.

Solution:

x=4;

e (4) = 4^2 + 6*4 + 21=16+24+21=61

m (4) = 8*4=32

v (4) = 31*4=124

v (4) >e (4) >m (4)

Therefore, The function v (x) has the largest value when x = 4.