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mrs_skeptik [129]

3 years ago

15

Which equation is equal to 4a + 2b = 10?

1 answer:

Contact [7]3 years ago

8 0

B = -2a + 5
good luck :)))

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he sum of the first two terms of a G.P is 27 whereas the sum of the second and third term is 54. Find the first term and the com

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Answer:

${ \tt{sum = \frac{a(r {}^{n - 1} )}{n - 1} }} \\ 27 = \frac{a(r {}^{2 - 1} )}{2 - 1} \\ { \bf{27 = ar - - - (i)}} \\ \\ 54 = \frac{a( {r}^{3 - 1} )}{3 - 1} \\ { \bf{108 = a {r}^{2} - - - (ii) }} \\ { \tt{(ii) \div (i) : }} \\ r = \frac{108}{27} \\ { \bf{common \: ratio = 4}} \\ { \bf{first \: term = \frac{27}{4} }}$

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Grace [21]

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Step-by-step explanation:

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