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3 years ago

Find the circumference

Mathematics

2 answers:

AleksAgata [21]3 years ago

5 0

12 times 3.14 = 37.68 CM
C=D x 3.14

nata0808 [166]3 years ago

4 0

Answer:

37.7 cm

Step-by-step explanation:

C = 2πr

diameter = 12cm

radius(r) = diameter ÷ 2
radius(r) = 12 ÷ 2
radius(r) = 6cm
C = 2πr
= 2 × 22/7 × 6
Circumference = 37.7 cm

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When common difference, $d=\sqrt{39}$ then the largest term of these four terms will be $6+3\sqrt{39}$

Let four consecutive terms of AP is,

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Since, sum of all four terms is 24

So, $a-3d+a-d+a+d+a+3d=24\\\\a=6$

And product is 945

So, $(a-3d)(a+3d)(a-d)(a+d)=945\\\\9d^4-360d^2+351=0\\\\d^4-40d^2+39=0\\\\(d^2-1)(d^2-39)=0\\\\d=1,-1\\d=\sqrt{39}, -\sqrt{39}$

When d= 1, -1 then largest term is 9

When $d=\sqrt{39}, -\sqrt{39}$ then largest term is $6+3\sqrt{39}$

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https://brainly.in/question/3719232

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