Find the first, fourth, and eighth terms of the sequence. A(n) = −5 ∙ 2x − 1

Step-by-step explanation:

The rule for the sequence is

where x is the number of terms

For the first term

x = 1

That's

A(1) = 5(1)

For the fourth term

x = 4

A(4) = 5(8)

For the eighth term

x = 8

A(8) = 5(128)

Hope this helps you

The first option.

Step-by-step explanation:

The first term of the sequence would be...

A(1) = -5 * 2^(1 - 1)

= -5 * 2^0

= -5 * 1

= -5

The fourth would be...

A(4) = -5 * 2^(4 - 1)

= -5 * 2^3

= -5 * 8

= -40

The eighth would be...

A(8) = -5 * 2^(8 - 1)

= -5 * 2^7

= -5 * 128

= -640

So, the correct answer is the first option.

Hope this helps!

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

hey! so 1 (25) out of 4 (100) is 25 so your answer is 25%. it's like quarters!