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Given series is <br> ` 3 - 6 +9-12+…` <br> `= 3 (1) +6(-1) +9(-1)^(2) +12 (-1)^(3) +…` <br> Now , `a_(15^(th) "term of " 3, 6, 9,…)xx(15^(th)"term of " 1, -1,(-1)^(2),…)-` <br> ` = 45 xx(-1)^(14)` <br> = 45 Transcript

Time | Transcript |
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00:00 - 00:59 | this question came to find the 15 term of the series 3 - 6 plus 9 - 12 upto n terms used this question but I think this is given to a CS3 - 6 plus 9 - 12 + 1531 about will do this weekend at this equation is 3 into one plus 6 into minus 1 + 9 into minus 1 whole square + 12 into minus 1 whole cube and similarly card 832101 62 - 12 - 6 98 - 16 February 1991 to 1998 12 into minus 12 will be equal to minus 2 minus plus just write the equation sheet carefully so sweet carefully with see that these are the multiple rows 33 |

01:00 - 01:59 | 6912 12381 result 12 - 1 getting my dear X - 1 inch in each of the desi questions what we do is safe to find the 15 term the 15 term will be 15 term will be 3 to 15 because we're getting 326039 third term is 323 second 322-324 the 15 time will be the 15 term of the series will be 15 term of 369 this series into the 15 term of one into minus 1 into minus 1 whole square into minus 1 whole cube cities ok 15 term of 369 |

02:00 - 02:59 | this is a species can see the age of 23 and b is equal to 3 then a team of the season by a piece is given by x is equal to a plus and minus 1 into be sure to find the 50 Series 15 term will get if 3 is equal to a plus 15 minus 1 into dieselgate 3 + 3 into 3 equal to 3 + 14 23 4245 ok and 15 term of the series will be the scene of GP series in which is equal to 1 and R is equal to -1 ok and a term of GP is given by air into a - 1 Chapter 15 terms will be is 1 Rs 200 - 110 and Mysore only 14 will get a 15 Tum is equal to |

03:00 - 03:59 | 11535 to find is she is the 15th term of the series and 15 terms of the series will get answer as he 15 biscuit 2215 term of the series 45 and 15 term of this is one transfer will be 4515 term of the series will be 45 I will explained by seat these are two separate series in which the series EP 3 6 9 12 is 1 -1 -1 No 22 see that this is multiple of 3 3 6 9 12 ok and this is a multiple of -1 15 252 multiple of 3 and 15 term of this 1 -1 -1 -1 will be 58 - 1 they found this equation and answers 45 |

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