Find the 20th term from the last term of the ap 3, 8, 13, 253
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Answer:
The answer is 158
Step-by-step explanation:
The given AP : 3,8,13.............. 253 ; d = 5
We want the 20th term from the last
Therefore we can reverse the AP : 253 , 248 ,243, ........... 3
here d = -5 since we reversed the AP
a20 = a + 19d
= 253 +19 [ -5 ]
= 253 - 95
= 158
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