Insert three arithmetic means between -16 and 4.
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Insert three arithmetic means between -16 and 4.
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Answer:
-16, -11, -6, -1, 4
Step-by-step explanation:
a1 = -16, a5 = 4, n = 5, d = ?
d = (an-a1) / (n-1)
d = [4-(-16)] / (5-1)
d = (4+16) / 4
d = 20 / 4
d = 5
Use the common difference to find the missing terms.
a2 = -16+5= -11
a3 = -11+5= -6
a4 = -6+5= -1
-16, -11, -6, -1, 4