. Find the sum of the first 30 terms of the series:16 + 19 + 22 +......
2 answers:
Answer:
<h3>The answer is 1785</h3>Step-by-step explanation:
The above sequence is an arithmetic sequence
The sum of an nth term of an arithmetic sequence is written as
Where n is the number of terms
a is the first term
d is the common difference
From the question
n is 30
a is 16
d = 19 - 16 = 3
So the first 30 terms of the series is
Hope this helps you.
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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: