Evaluate $f (x) = - 4 x - 5$ for $x = - 1$ ?

- 9

No worries! We‘ve got your back. Try BYJU‘S free classes today!

4

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1

No worries! We‘ve got your back. Try BYJU‘S free classes today!

- 1

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is C $- 1$
For each occurrence of $x$ in $f (x)$ substitute $- 1$ and calculate the result:
$f (x) = - 4 x - 5$ becomes:
$f (- 1) = (- 4 \times - 1) - 5$
$f (- 1) = 4 - 5$
$f (- 1) = - 1$

Suggest Corrections

Similar questions

Evaluate :

$(i) (- 5)^{\circ} (i i) 8^{\circ} + 4^{\circ} + 2^{\circ} (i i i) (8 + 4 + 2)^{\circ} (i v) 4 x^{\circ} (v) (4 x)^{\circ} (v i) [(10^{3})^{\circ}]^{5} (v i i) (7 x^{\circ})^{2} (v i i i) 9^{\circ} + 9^{- 1} - 9^{- 2} + 9^{\frac{1}{2}} - 9^{- \frac{1}{2}}$