Ответ:
Объяснение:
4. (6a)/(35c⁵) -(9b)/(14c²)=(12a)/(70c⁵) -(45c³b)/(70c⁵)=(12a-45bc³)/(70c⁵)=(3(4a-15bc³))/(70c⁵)
(9-5b)/b -(7-5c)/c=(9c-5bc-7b+5bc)/(bc)=(9c-7b)/(bc)=-(7b-9c)/(bc)
1/x³ -(1+x²)/x⁵=(x²-1-x²)/x⁵=-1/x⁵
5. n/(n-7) -n²/(n²-14n+49)=n/(n-7) -n²/(n-7)²=(n²-7n-n²)/(n-7)²=-(7n)/(n-7)²=-(7n)/(n²-14n+49)
3n -(9n²-2)/(3n)=(9n²-9n²+2)/(3n)=2/(3n)
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Answers & Comments
Ответ:
Объяснение:
4. (6a)/(35c⁵) -(9b)/(14c²)=(12a)/(70c⁵) -(45c³b)/(70c⁵)=(12a-45bc³)/(70c⁵)=(3(4a-15bc³))/(70c⁵)
(9-5b)/b -(7-5c)/c=(9c-5bc-7b+5bc)/(bc)=(9c-7b)/(bc)=-(7b-9c)/(bc)
1/x³ -(1+x²)/x⁵=(x²-1-x²)/x⁵=-1/x⁵
5. n/(n-7) -n²/(n²-14n+49)=n/(n-7) -n²/(n-7)²=(n²-7n-n²)/(n-7)²=-(7n)/(n-7)²=-(7n)/(n²-14n+49)
3n -(9n²-2)/(3n)=(9n²-9n²+2)/(3n)=2/(3n)