Whiich term of the ap 4,12,20,28... Will be 120 more than its 21st term.
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Answer:
36th term
Step-by-step explanation:
tₙ = a + (n-1)d
a=4, d = 8.
21st term is
t₂₁ = 4 + (21-1)8 = 164.
So the number that is 120 more than 21st term = 164 + 120 = 284.
284 = 4 + (n-1)8
=> (n-1)8 = 280
=> n - 1 = 35
=> n = 36.
Thus the term is 36th term.
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