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my friend in this question some mistake ..........aditiin = addition so not clear
answer :=1+2+3+4+5+6+7+8+9 = Similarly,=9 +8+7+6+5+4+3+@+1 = Therefore, = (-) = =8+6+4+1+9+7+5+3+2 = (we know that= and =) Hence, (-) =
