could you please help me for finding an unambiguous CFG for the following expression:$a^ib^j$ where $i \le j \le 2i$
Unambiguous CFG for $a^ib^j$ where $i \le j \le 2i$
formal languages;context free;formal grammars;ambiguity
$S \rightarrow$ $aSb$  |   $J$$J \rightarrow aJbb$ | $$This has only one derivation tree for a word in that language.