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ASHA 777 [7]
3 years ago
9

Calculate the area of parallelogram ORST

Mathematics
1 answer:
posledela3 years ago
6 0

Answer:

6,000

Step-by-step explanation:

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In a GP, the sixth term is eight times the tenth term. The sum of the seventh and the eighth term is 192. Find the common ratio
liubo4ka [24]

Let <em>a</em>(<em>n</em>) denote the <em>n</em>-th term in the GP. We're given

<em>a</em>(6) = 8<em>a</em>(10)

<em>a</em>(7) + <em>a</em>(8) = 192

In a geometric progression, consecutive terms are scaled up or down by a fixed ratio <em>r</em> such that

<em>a</em>(<em>n</em>) = <em>r</em> <em>a</em>(<em>n</em> - 1)

By substitution, we get

<em>a</em>(<em>n</em>) = <em>r</em> (<em>r</em> <em>a</em>(<em>n</em> - 2)) = <em>r</em> ² <em>a</em>(<em>n</em> - 2)

and we can continue the pattern down to the first term,

<em>a</em>(<em>n</em>) = <em>r</em> <em>a</em>(<em>n</em> - 1) = <em>r</em> ² <em>a</em>(<em>n</em> - 2) = <em>r</em> ³ <em>a</em>(<em>n</em> - 3) = … = <em>rⁿ </em>⁻¹ <em>a</em>(1)

So we can rewrite the first two equations in terms of the first term of the GP <em>a</em>(1) and the common ratio <em>r</em> :

<em>r</em> ⁵ <em>a</em>(1) = 8<em>r</em> ⁹ <em>a</em>(1)

<em>r</em> ⁶ <em>a</em>(1) + <em>r</em> ⁷ <em>a</em>(1) = 192

Solve the first equation for <em>r</em> :

<em>r</em> ⁵ <em>a</em>(1) = 8<em>r</em> ⁹ <em>a</em>(1)   →   1 = 8<em>r</em> ⁴   →   <em>r</em> = 1/∜8 ≈ 0.5946

Solve the second equation for <em>a</em>(1) :

<em>r</em> ⁶ <em>a</em>(1) + <em>r</em> ⁷ <em>a</em>(1) = <em>r</em> ⁶ <em>a</em>(1) (1 + <em>r</em> ) = 1/(16√2) <em>a</em>(1) (1 + 1/∜8) = 192

→   <em>a</em>(1) = 6144 ∜2 / (1 + ∜8) ≈ 2724.48

6 0
3 years ago
Please help with this question!!!
kondor19780726 [428]
It’s the first one (2,2)(3,5)(4,0)
7 0
3 years ago
Write a function rule for 5 less than one fourth of x is y
larisa86 [58]
5 <1/4x=y. I'm pretty sure
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3 years ago
Which equation is equivalent to 23x= 10?
vovangra [49]
That answer would be d
cause I’m big brain
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if the probability of drawing a red card from a box is 3/8, what are the odds against drawing a red card from the box
tigry1 [53]

Answer: 5/8

Step-by-step explanation:

Simply do 8/8(1)-3/8 to get 5/8

<em>Hope it helps <3</em>

5 0
4 years ago
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