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zhenek [66]
3 years ago
9

Please helpppppppppppppp

Mathematics
1 answer:
Marina CMI [18]3 years ago
6 0

Answer=A

Area=Length ×Breath

Length=2cm

Breath=5cm +4cm=9cm

area = 2cm ×9cm=18cm square

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If the sum of the first 12 terms of a geometric series is 8190 and the common ratio is 2. Find the first term and the 20th term.
Reil [10]

The first term is 2 and the 20th term is 1048576 .

<u>Step-by-step explanation:</u>

Here we have , If the sum of the first 12 terms of a geometric series is 8190 and the common ratio is 2. We need to Find the first term and the 20th term. Let's find out:

We know that Sum of a GP is :

⇒ S_n = \frac{a(r^n-1)}{r-1}

So ,Sum of first 12 terms is :

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Now , nth term of a GP is

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So , 20th term is :

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⇒ a_2_0 = 1048576

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3 years ago
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2 years ago
Read 2 more answers
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