The sum of three numbers of an AP is 12 and the sum of their cubes is 288 find the numbers.

Mathematics

1 answer:

son4ous [18]2 years ago

5 0

Answer:

The numbers are 2 , 4 , 6 or 6 , 4 , 2

Step-by-step explanation:

For solution kindly refer to the attachment .

Related Information :- 

• The sum of n terms of an AP is ,

=> S = n/2 [ 2a + ( n - 1 ) d ]

• The nth term of an AP is ,

=> T_n = a + ( n - 1 ) d

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Alex Ar [27]

I’m guessing it’s the first one

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2 years ago

-2x + y = 0 -7x + 3y = 2

dsp73

This is a system of equations.
First, you set everything in terms of y.
Take the first equation and move set everything equal to y
y=0+2x
Since it’s 0, you don’t need to put it, so
y=2x works.
Then, you plug y=2x into the bottom equation, for the y.
-7x +3(2x)=2. You do this because now you have the same variable for both and it can be solved easily.
Then you can simplify.
-7x+3x = 2
Then combine like terms.
-4x = 2
Divide by -4 on each side.
x = -1/2
So, now that you have x, you can plug in your x-value back into the top equation.
-2(-1/2) + y = 0
Combine like terms
1+y=0
Get y by itself
y=-1
There you have it!
You can check by plugging in both values to any of the equations. We will use the top one here.
-2(-1/2) + (-1) =0
+1 + -1 = 0
It works!
So,
X= -1/2
Y= -1
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2 years ago

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Twice a number take away one

OlgaM077 [116]

2x -1 is the answer I believe

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2 years ago

-6(x+7)=-4x-2 How many solutions does it have

geniusboy [140]

Answer:

Equation have Unique solution i.e $x=-20$