chynahbug5676
06.01.2021 •
Mathematics
What is the nth ternm of this sequence -4,1,6,11,16,
a 5n-4
b -4n+5
c -9n
d 5n-9
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Ответ:
Step-by-step explanation:
Given sequence:
-4, 1, 6, 11, 16, ...It is an AP with:
The first term is a = -4Common difference is d = 5Nth term of this sequence is:
aₙ = a + (n - 1)daₙ = - 4 + 5(n - 1) = -4 + 5n - 5 = 5n - 9Correct option is d.
Ответ:
Step-by-step explanation:
First term = -4Common difference = 1-(-4)=1+4=5Formula used: L =a+(n-1)dwhere, L is the last term;
a is the first term ;
n is the number of terms;
and d is the common difference.
L = -4+(n-1)5= -4+5n-5 = 5n-9Therefore, the last term is (5n-9).
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