Question

find the 8th term from the end of ap 3,7,11,15......175,179. give a brief explanation please..​

Answer 1

Answer:

hope it helps............

Answer 2

The 8th term from the last  is 147

Step-by-step explanation:

here ,  a = 3

d= 7-3 = 4

l = 179

l = a+(n-1) d

179 = 3+(n-1) 4

179 = 3+ 4n-4

179= 4n-1

179+1=4n

180 = 4n

n = $\frac{180}{4}$

n = 45

there are 45 terms in the AP

the 8th term from the last will be the 37th term

$a_3_7 = a+36d\\a_3_7 = 3+ (36\times 4)\\a_3_7 = 147$

hence, The 8th term from the last  is 147

#Learn more:

What is the difference between 3rd and 8th terms of the AP, 3,7,11,15....​

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