the 10th and 12th terms of an arithmetic sequence are 11 and 14 respectively, a. what is d? b. what is a1? c. what is a100? I need exact answer
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Answer:
Correct answer:
17
Step-by-step explanation:
To find the common difference d, use the formula a1+4d=a5.
For us, a1 is 10 and a5 is 38.
10+4d=38
Now we can solve for d.
4d=28
d=7
Add the common difference to the first term to get the second term.
a2=a1+d=10+7=17
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