Mathematics
13.09.2021 14:45
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T(n) is the total number of lights in a triangular lighting rig of n rows, as shown.
T(n) is the total number of lights in a triangular lighting rig of n rows, as shown. which polynomial function represents t(n + 1)?
t(n)=1/2n^2+1/2n
a. t(n+1)=1/2n^2+3/2n+1
b. t(n+1)=1/2n^2+1/2n+1
c. t(n+1)=1/2n^2+n+1
d. t(n+1)=1/2n^2+1
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t(n)=1/2n^2+1/2n
a. t(n+1)=1/2n^2+3/2n+1
b. t(n+1)=1/2n^2+1/2n+1
c. t(n+1)=1/2n^2+n+1
d. t(n+1)=1/2n^2+1
adriana238
4,4(9 marks)
The answer is a. T(n+1)=1/2n^2+3/2n+1
T(n) = 1/2n² + 1/2n = 1/2(n² + n)
T(n + 1) = 1/2((n+1)² + (n+1))
(a + b)² = a² + 2ab + b²
(n + 1)² = n² + 2n + 1
T(n + 1) = 1/2(n² + 2n + 1 + n + 1) =
= 1/2(n² + 3n + 2) =
= 1/2n² + 3/2n + 1
T(n) = 1/2n² + 1/2n = 1/2(n² + n)
T(n + 1) = 1/2((n+1)² + (n+1))
(a + b)² = a² + 2ab + b²
(n + 1)² = n² + 2n + 1
T(n + 1) = 1/2(n² + 2n + 1 + n + 1) =
= 1/2(n² + 3n + 2) =
= 1/2n² + 3/2n + 1
pennygillbert
4,6(78 marks)
the first one
Step-by-step explanation:
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