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ELEN [110]
3 years ago
10

Given an=n^3-2n what is a3 please don't attach file!!!!

Mathematics
1 answer:
sineoko [7]3 years ago
5 0

Answer:

21

Step-by-step explanation:

Try using this notation:  a(n)     and not    an.

an=n^3-2n becomes    a(n) = n^3 - 2n.

Then a(1) = 1^3 - 2(1) = 1 - 2 = -1

         a(2) = 2^3 - 2(2) = 8 - 4 = 4

         a(3) = 3^3 - 2(3) = 27 - 6 = 21

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b

Step-by-step explanation:

4 0
3 years ago
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two adjacent angles of a parallelogram are in the ratio 5:2: . find all the angles of the parallelogram​
kicyunya [14]

<h2>Given :-</h2>

  • Two adjacent angles of a parallelogram are in the ratio of 5 : 2.

<h2>To Find :-</h2>

  • What is the all angles of the parallelogram.
<h3 /><h3 /><h2>Solution :-</h2>

Let, the first angles be 5x

And, the second angles will be 2x

As we know that,

★ Sum of all angles = 180° ★

According to the question by using the formula we get,

  • ⇒ 5x+2x=180°

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  • ⇒ \sf x =\: \dfrac{\cancel{180^{\circ}}}{\cancel{7}}

  • ➠ \sf\bold{\red{x =\: 25.7^{\circ}}}

Hence, the required angles are,

  • First angles = 5x = 5(25.7°) = 128.5°
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As we know that, 

opposite angles in a parallelogram

is equal.

∴ The all angles of a parallelogram is 128.5°,51.4°, 128.5° and 51.4°.

6 0
2 years ago
If ABCD is a rectangle, calculate x as a function of α
Yanka [14]

Answer:

Step-by-step explanation:

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and the width is 4 squares

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<B = 90 degree

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Then B = alpha + 2x

90 = alpha +2x

90-alpha = 2x

x = (90-alpha)/2

4 0
3 years ago
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Find the missing side of the missing side.<br><br> The length of the missing side is: ?m
WARRIOR [948]
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57^2+b^2=95^2

3249+b^2=9025

b^2=5776

Take sqr on both sides and you get:

b=76m
3 0
3 years ago
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