If 4 times the fourth term og an AP is equal to 18 times its 18th term

1.	If 4 times the fourth term og an AP is equal to 18 times its 18th term find its 22 term
Answer» Solution: let first term = acommon difference = dATQ.=> 4a4= 18a18=> 4 (a+3d) = 18(a+17d)=> 4a + 12d = 18a + 306d=> 14a - 294d = 0divide by 14=> a+21d = 0=> a+(22-1)d =0=> a22\xa0= 0so 22th term is 0\xa0

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