Question

[love tfboys and exo and song jong k...]

1, tính nhanh a)   \(\left(\frac{1}{2}-1\right)\left(\frac{1}{3}-1\right)\left(\frac{1}{4}-1\right)...\left(\frac{1}{100}-1\right)\)    

b)\(\left(1+\frac{1}{1.3}\right)\left(1+\frac{1}{2.4}\right)\left(1+\frac{1}{3.5}\right)...\left(1+\frac{1}{99.100}\right)\)                                

Answer 1

[love tfboys and exo and song jong k...]

hay giup minh nha