Question

5. Facorise *
(1 Point)
x3 - 2252
x2 (1 - 15x) (1 + 15r)
x(x - 15)(x + 15)
x(x - 15x)(x - 15)
x{ 1 + 15x) (1 - 15x)​

Answer 1

Step-by-step explanation:

f(x)=x

3

−15x

2

+75x−50

for function must be increasing f

′

(x)>0

f

′

(x)=3x

2

−30x+75=3(x−5)

2

≥0∀x∈R

Since 3(x−5)

2

≥0∀x∈R

So f(x) is an increasing function for all x∈R.