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B=2²x3x7
C=2³x3x7x11
a)AXB=2³x3⁵x7x2²x3x7=2³⁺²x3⁵⁺¹x7¹⁺¹=2⁵x3⁶x7²
b)AXC=2³x3⁵x7x2³x3x7x11=2³⁺³x3⁵⁺¹x7¹⁺¹x11=2⁶x3⁶x7²x11
c)BXC=2⁵x3²x7²x11
d)AXBXC=2⁸x3⁷x7³x11
e)A:B=2³x3⁵x7):(2²x3x7)=2³⁻²x3⁵⁻¹x7¹⁻¹=2x3⁴x7°=2x3⁴
f)=2x11