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strojnjashka [21]
2 years ago
15

What is the rule for the following sequence:-1; -4; -9; -16; -25​

Mathematics
1 answer:
Kryger [21]2 years ago
4 0

Answer:

It´s an exponential rule. where one of the factors is negative

Step-by-step explanation:

1 * -1 = -1

2 * -2 = -4

3 * -3 = -9

4 * -4 = -16

5 * -5 = -25

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3 years ago
X+y=5<br> x×y=6<br> Solve simultaneously with steps
igor_vitrenko [27]

Answer:

(3, 2), (2, 3)

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x + y = 5

xy = 6

Solve the first equation for x.

x = 5 - y

Substitute 5 - y for x in the second equation.

xy = 6

(5 - y)y = 6

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y² - 5y + 6 = 0

Factor.

(y - 2)(y - 3) = 0

y - 2 = 0  or y - 3 = 0

y = 2  or y = 3

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x + 2 = 5

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One solution is x = 3; y = 2, or (3, 2).

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