By calculating th

Formula used/Theory.

Putting the value of ‘x’ in f(x) gives out the value of f(x) on ‘x’

We have,

f(x) = 2x³ + x² + x + 4

When we put x = 1

Then,

f(1) = 2(1)³ + (1)² + 1 + 4

f(1) = 2+1+1+4

f(1) = 8

When we put x = –1

Then,

f(-1) = 2(-1)³ + (-1)² + (-1) + 4

f(-1) = (-2) +1–1+4

f(-1) = 2

Conclusion.

The value of f(1), f(-1) are 8, 2 respectively.