find the value of x if 3 x, 12 and X are in AP
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3x,12,X are in Ap then
12-3x=X-12=common difference d
solving
4x= 24
x=6
so the given AP is
18,12,6
12-3x=X-12=common difference d
solving
4x= 24
x=6
so the given AP is
18,12,6
learner2002:
how you calculated common difference
i really wanted to know
t2-t1=d. next term-last term=common difference
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