De som van de derde en de vierde term van de rij met algemene term t
n
= n.(−1)
n
is
A. 1
B. 2
C. − 1
D. 7
E. 5
[ 6-4677 - op net sinds 3.4.2025-(E)- ]
Translation in E N G L I S H
What is the sum of the third and fourth terms ?
Oplossing - Solution
t
3
= 3.(−1)
3
= 3.(−1) = −3
t
4
= 4.(−1)
4
= 4.1 = 4
−3 + 4 = . . .
