If second term of an APis (x-y) and fifth term is (x+y), find its first term.
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Answer:
a=3x-5y/3
Step-by-step explanation:
ATQ(according to question)
a+d=x-y _______(1)
a+4d=x+y ________(2)
(2)-(1)
-3d=-2y so d=2/3y
substituting d =2/3y in (1),
=> a+2/3y=x-y
=> a=3x-5y/3
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