Объяснение:
1)...=49: (25*21)=7:(25*3)=7/75
2)...=7⁻²²:7⁻²³=7⁻²²⁻⁽⁻²³⁾=7⁻²²⁺²³=7¹=7
3...=(√98):7=√98:√49=√(98:49)=√2
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Объяснение:
1)...=49: (25*21)=7:(25*3)=7/75
2)...=7⁻²²:7⁻²³=7⁻²²⁻⁽⁻²³⁾=7⁻²²⁺²³=7¹=7
3...=(√98):7=√98:√49=√(98:49)=√2