3 years ago

What is the 7th term of the geometric sequence 4, -20, 100

1 answer:

4 0

1st let's calculate r the common ratio:
r = (-20)/4 = (100/-20) = -5

Value of nth term = a₁.rⁿ⁻¹, where a₁= 1st term and n, the rank

Value of nth term = 4r⁽⁷⁻¹⁾ = 4.(-5)⁶

Value of nth term = 62,500

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Answer:

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2 years ago

The average of five numbers is 18. let the first number be increased by 1, the second number by 2, the third number by 3, the fo

grandymaker [24]

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HELP ME PLEASE!! Word problem, what's wrong? explain.

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Answer:

She made a mistake in Step 7.

Step-by-step explanation:

Step 1 through 6 are correct. Only from Step 6 to Step 7 the problem comes in: both sides of the equation are multiplied by x, however the x on the left side, by error, becomes 1. The correct state in Step 7 should look like this:

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