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Find an equation for the nth term of the arithmetic sequence. a15 = -53, a16 = -5 A) an = -725 - 48(n - 1) B) an = -725 + 48(n + 1) C) an = -725 + 48(n - 1) D) an = -725 - 48(n + 1)
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May 22, 2018
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Find an equation for the nth term of the arithmetic sequence.
a15 = -53, a16 = -5
A) an = -725 - 48(n - 1)
B) an = -725 + 48(n + 1)
C) an = -725 + 48(n - 1)
D) an = -725 - 48(n + 1)
Mathematics
high-school
Amitchd
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an=a1+d(n-1)
every term increases by d amount
so
therefor
-53+d=-5
add 53 both sides
d=48
alright
an=a1+d(n-1)
an=a1+48(n-1)
use a15=-53
a15=-53=a1+48(15-1)
-53=a1+48(14)
-53=a1+672
minus 672 both sides
-725=a1
the equation is
an=-725+48(n-1)
answer is C
Nicolas Brown
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May 29, 2018
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Nicolas Brown
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