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=1/(-2)² *1/5³ *100=1/4*1/125*100=100/500=1/5 A
2]
=(2⁵)⁻⁴: 8⁻⁵=2⁻²⁰:(2³)⁻⁵=2⁻²°;2⁻¹⁵=2⁻⁵ B
3]
a⁻¹⁸:(a*a⁶) /(a³)²=a⁻¹⁸:a⁷/a⁶=a⁻²⁵/a⁶=a⁻³¹ A
4]
=-9+1 *( 3-5)³=-9+(-2)³=-9-8=-17