Students and
parents will arrange the plants in triangular formation. If the first row will contain 19 plants and the succeeding
row will be 2 plants fewer. How many plants will be placed in the 6th row? How many rows will be made if the
last row contains 1 plant?
ARITHMETIC SEQUENCE OR MEANS PO YATA TOH : )
parents will arrange the plants in triangular formation. If the first row will contain 19 plants and the succeeding
row will be 2 plants fewer. How many plants will be placed in the 6th row? How many rows will be made if the
last row contains 1 plant?
ARITHMETIC SEQUENCE OR MEANS PO YATA TOH : )
Answers & Comments
Answer:
a6=9
n=10
Step-by-step explanation:
an=a1+(n-1)d
a6=19+(6-1)-2
=19+(5)-2
=19+(-10)
a6=9
1=19+(n-1)-2
1=19+(-2n)+2
1= -2n+21
1-21= -2n
-20=-2n
-20/-2=-2n/-2
10=n