Calculation. 199 + 299 + 399 + +29699
199+299+399+… +29699,=1+2+3+… 29699,=148×29799,=444.
1 * 2 / 3 plus 3 * 2 / 5 plus 2 / 5 * 7 - how much does it equal to 2 / 97 * 99?
Original formula = (1-1 / 3) + (1 / 3-1 / 5) + (1 / 5-1 / 7) +... + (1 / 97-1 / 99)
=1-1/99
=98/99
How much is one plus one plus two plus two to plus 99
9900