e)
A concrete structure has slabs, each being taller than the previous. The heights of
the slabs are 7 m, 12 m, 17 m, and so on for 11 more slabs. Based on the given
pattern, form an expression to find the height of the nth slab.
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Answer:
height of n slab = 5n +2
Step-by-step explanation:
Given: The heights of the slabs are 7 m, 12 m, 17 m, and so on.
To form an expression to find the height of the n slab
Solution:
The heights of the slabs are 7 m, 12 m, 17 m, and so on .
a = 7
d = 12 -7 = 5
17-12 = 5
Hence its an ap
a = 7
d = 5
an = a+ (n - 1)d
an = 7 + (n - 1)5
an = 7 + 5n - 5
an = 5n + 2
height of n slab = 5n +2
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