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4 years ago

If f is a function, then f(3x)=3f(x)

1 answer:

7 0

This is false.
The f(3x) means you are multiplying the input 'x' by 3 before plugging into the equation.
3f(x) means you are going to multiply your answer (output) by 3 after you've plugged the input value in and gotten the output.

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Allushta [10]

I think the answer may (0,0). This is just a guess

8 0

3 years ago

Given the following perfect square trinomial, fill in the missing term. (2 points)<br> 9x^2 +___+25

Zielflug [23.3K]

Answer:

30x

Step-by-step explanation:

missing must be 2×3x×5=30x

9x²+30x+25=(3x+5)²

5 0

3 years ago

zubka84 [21]

Answer:

See Explanation Below

Step-by-step explanation:

Given

$(sin x - cos x)^2 = sec^2x - tan^2x - 2sinx.cos x.$

Required

Prove

To start with; we open the bracket on the left hand side

$(sin x - cos x)^2 = (sin x - cos x)(sin x - cos x)$

$(sin x - cos x)^2 = (sin x )(sin x - cos x)- (cos x)(sin x - cos x)$

$(sin x - cos x)^2 = sin^2 x -sinx cos x - sin xcos x + cos^2 x$

$(sin x - cos x)^2 = sin^2 x -2sinx cos x + cos^2 x$

Reorder

$(sin x - cos x)^2 = sin^2 x + cos^2 x - 2sinx cos x$

From trigonometry;

$sin^2x + cos^2x = 1$

So;

$(sin x - cos x)^2 = sin^2 x + cos^2 x - 2sinx cos x$

becomes

$(sin x - cos x)^2 = 1 - 2sinx cos x$

Also from trigonometry;

$sec^2x - tan^2x = 1$

So,

$(sin x - cos x)^2 = 1 - 2sinx cos x$

becomes

$(sin x - cos x)^2 = sec^2x - tan^2x - 2sinx cos x$

Proved

3 0

3 years ago

This -1/5(10t-15)and -2t+3 Equivalent???? help please 5 rate??

Serga [27]

Yes, I believe they are equivalent because if you were to solve -1/4(10t-15) it would equal -2t+3

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3 years ago

What is the measure of the angle formed by the minute hand and the hour hand of a clock when the clock shows 3:00?

FrozenT [24]

Answer: 90 degree angle

if im wrong let me know please

4 0

3 years ago

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