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Natali5045456 [20]

2 years ago

10

Solve using formula: 4x^2 - 4x + 1 = 0

2 answers:

Andreyy892 years ago

4 0

x

=

0.20710678 or 1.20710678

dybincka [34]2 years ago

3 0

Answer:

$x=0.5$

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Irina18 [472]

63 and 3 hope it’s right

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2 years ago

If f(x) = 5х – 7, what is f3)?

rewona [7]

Answer:

8

Step-by-step explanation:

When a number is put in the parenthesises with x you substitute that number in every time you see x.

f(x)=5x-7

f(3)=5(3)-7

f(3)=15-7

f(3)=8

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3 years ago

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Damm [24]

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3 years ago

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Step-by-step explanation:

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7 0

3 years ago

. Calculate the missing terms of the geometric sequence. 3072,?,?,?,12,.... Select all that apply.

Troyanec [42]

Answer:

The missing terms of the geometric series are

A. $-768,192,-48$

and

B. $768,192,48$

Step-by-step explanation:

The given geometric sequence is $...,3072,?,?,12,...$ .

The second and sixth term of the geometric sequence are $3072$ and $12$ respectively.

Recall that the nth term of a geometric sequence is given by,

$t_n=ar^{n-1}$ .

This implies that the second term will be,

$3072=ar^{2-1}$ .

$\Rightarrow 3072=ar---(1)$ .

Also the 6th term is

$12=ar^{6-1}$ .

$12=ar^{5}---(2)$ .

We divide equation (2) by (1) to get,

$\frac{ar^5}{ar}=\frac{12}{3072}$

$\Rightarrow r^4=\frac{1}{256}$

$\Rightarrow r=\pm \sqrt[4]{\frac{1}{256} }$

$r=\pm \frac{1}{4}$

If

$r=\frac{1}{4}$

We get,

$t_3=3072\times\frac{1}{4} =768$

$t_4=768\times\frac{1}{4} =192$

$t_5=192\times\frac{1}{4} =48$

But If

$r=-\frac{1}{4}$

We get,

$t_3=3072\times\frac{-1}{4} =-768$

$t_4=-768\times\frac{-1}{4} =192$

$t_5=192\times\frac{-1}{4} =-48$

Therefore the correct answer is A and B.

6 0

2 years ago

Read 2 more answers