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3 years ago

1. Sum of n terms the series:

Mathematics

1 answer:

tensa zangetsu [6.8K]3 years ago

5 0

Step-by-step explanation:

a. 246,913,578

2+22+222+2,222+22,222+222,222+2,222,222+22,222,222+222,222,222

b. 0.3+0.33+0.333+0.3333+0.33333+0.333333+0.3333333+0.33333333+0.333333333 =2.962962963

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3 years ago

Can y'all please help.

sattari [20]

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See explanation

Step-by-step explanation:

<u>Step 1.</u> Substitute for d to solve for n:

From the first equation:

$d=70-n$

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$0.1(70-n)+0.05n=5.5\\ \\7-0.1n+0.05n=5.5\\ \\7+(-0.05n)=5.5\\ \\-0.05n=5.5-7=-1.5\\ \\n=\dfrac{-1.5}{-0.05}=30$

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