3 years ago

PLSSSSSSS ANSWER!!!

Mathematics

1 answer:

Dmitrij [34]3 years ago

3 0

Tbh ion know the answer

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Can someone help me with this?

Anna35 [415]

Answer:

Let 'a' be the first term, 'r' be the common ratio and 'n' be the number of terms

Series = 2+6+18.......= 2+2•3¹+ 2•3².......= 728

Now,

$Sum = \frac{a( {r}^{n} - 1) }{(r - 1)} \\$

So,

$\frac{a( {r}^{n} - 1)}{(r - 1)} = 728 \\ \frac{2( {3}^{n} - 1) }{(3 - 1)} = 728 \\ \frac{2( {3}^{n} - 1) }{2} = 728 \\ {3}^{n} - 1 = 728 \\ {3}^{n}=728+1\\ {3}^{n} = 729 \\ {3}^{n} = {3}^{6} \\ \boxed{ n = 6}$

Therefore, number of terms is 6

6 is the right answer.

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3 years ago

19. If 1:3=4:x, then what is the value of x 9 12 4/3 15

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Answer:

Step-by-step explanation:

1 : 3 : : 4: x

Multiply 1 and x and multiply 3 and 4

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3 years ago

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asambeis [7]

Answer:

Horizontal Line

Step-by-step explanation:

Easy the line has the same Y all throughout it

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3 years ago

The triathletes were offered water as they rode by the volunteer station. The volunteers handed them cones with the dimensions s

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Find the area of the cone:
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Step-by-step explanation:

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3 years ago