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How can you use the arithmetic mean to find the missing terms in the arithmetic sequence 15, __, __, __, 47,. ?

User Adya
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3 votes

Answer:

HI,

55

Explanation:


u_1=15\\u_2=15+a\\u_3=15+2*a\\u_4=15+3*a\\u_5=15+4*a=47 \Longrightarrow\ a=(47-15)/(4) =8\\\\\boxed{u_6=15+5*a=15+5*8=55}\\


u_1=15\\u_2=15+8=23\\u_3=15+2*8=31\\u_4=15+3*8=39\\

User Zonko
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