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1. materi ekonomi barisan dan deret .................................https://drive.google.com/file/d/0B7W0tgX_KpTFRnoxT2ZlX2VFZnc/view?usp=sharing............................download

2. materi ekonomi suplay and demand ..............................https://drive.google.com/file/d/0B7W0tgX_KpTFbE5BX1VuY0hLdmc/view?usp=sharing............................download