Question

Figure shows playing cards stacked together in a
following manner
56 cards are stacked in this manner. 14 cards are in the bottom row,12
in the next row,10 in the row next to it, and so on. Based on the
observation answer the questions below-
The total number of rows in which
the cards are stacked
a)7
b)6
c)8
I NEED THE ANSWER WITH THE RIGHT STEPS

Answer 1

Answer:

The total number of rows in which

the cards are stacked

a)7

b)6

c)8

Answer : 7

Answer 2

Answer:

The answer is 7

Step-by-step explanation:

$a=14\\d=a_{2} - a_{1} \\d= 12-14 = -2\\a_{n} = 2\\\\a_{n} = a + (n-1)d\\\\2 = 14 + (n-1)-2\\2 - 14 = -2n + 2\\-12 = -2n + 2\\-12 -2 = -2n\\-14 = -2n\\-2n = -14\\n = -14 / -2\\n = 7$

Hence, the total number of rows in which  the cards are stacked is 7;