MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Theorems for Continuity

If fx = 3x ...

Question

If $f (x) = 3 x - 7$ , then what is the value of $3 f (3)$

A

6

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

B

5

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

C

4

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

D

8

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

Open in App

Solution

The correct option is A $6$
Given,
$f (x) = 3 x - 7$
$3 f (x) = 3 (3 x - 7)$
Putting $x = 3$
$f (3) = 3 \times 3 - 7$
$= 9 - 7 = 2$
So we get, $f (3)$ $= 2$
$3 f (3) = 3 \times 2 = 6$

Suggest Corrections

thumbs-up

0

Similar questions

f (x) = 3 x - 7

, then what is the value of

f (2)

?

f (x) = - 3 x - 5

, then the value of

f (2)

Q. What is the value of

(\frac{1}{\sqrt{9} - \sqrt{8}} - \frac{1}{\sqrt{8} - \sqrt{7}} + \frac{1}{\sqrt{7} - \sqrt{6}} - \frac{1}{\sqrt{6} - \sqrt{5}} + \frac{1}{\sqrt{5} - \sqrt{4}})

∣ ∣ ∣ \begin{matrix} 3 x & 7 - 2 & 4 \end{matrix} ∣ ∣ ∣ = ∣ ∣ ∣ \begin{matrix} 8 & 7 6 & 4 \end{matrix} ∣ ∣ ∣

, then find the value of

x

f (x) = \frac{3 x + 7}{6 x + 4}

what value does

f (x)

x

gets infinitely larger?

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Algebra of Continuous Functions

MATHEMATICS

Watch in App

explore_more_icon

Explore more

Theorems for Continuity

Standard XII Mathematics

Join BYJU'S Learning Program

CrossIcon