حاصل عبارت ${{\mathop a\nolimits^5 \mathop b\nolimits^2 \mathop z\nolimits^{ - 2} } \over {\mathop a\nolimits^{ - 2} \mathop b\nolimits^7 \mathop z\nolimits^3 }}$ به صورت تواندار کدام است؟
1 )
${{\mathop a\nolimits^5 } \over {\mathop {(bz)}\nolimits^{7} }}$
${{\mathop a\nolimits^7 } \over {\mathop {(bz)}\nolimits^{5} }}$
3 )
${{\mathop a\nolimits^3 } \over {\mathop {(bz)}\nolimits^{ - 4} }}$
4 )
${{\mathop a\nolimits^5 } \over {\mathop {(bz)}\nolimits^{ -6} }}$