### Discussion :: Surds and Indices - General Questions (Q.No.1)

Maneesha said: (Nov 29, 2010) | |

4(power of 3.5) 17 to the power of x in the value is |

Devika said: (Jan 20, 2011) | |

How + came in second step? |

Aravindhsvcoe said: (Aug 13, 2011) | |

a^m+a^n=a^m+n.according this formula sum of LHS power is equal to RHS power.i.e.3.5+4.5 = 8. |

Sid said: (Feb 25, 2012) | |

(2^n * 6^ m+1 * 2^n+1 * 3^2m)/ (3^-n * 6^2m * 2^4+m)=181398528 then the value of n is? |

Swati said: (Dec 16, 2013) | |

Simple calculation is: (17)3.5 x (17)x = (17)8. So, 3.5+x = 8. Means x = 8-3.5. x = 4.5. |

Ma Awa Barry said: (Feb 5, 2014) | |

(17)3.5 x(17)x = (17)8. Therefore,(17)3.5+x = (17)8. x = (17)8-3.5. x = (17)4.5. |

Mithun said: (Jun 22, 2014) | |

As per the laws of exponential (x)y.(x)m = (x)y+m. (17)3.5*(17)x = (17)8. 3.5 + x = 8. X = 8 - 3.5. X = 4.5. |

Taniya said: (Dec 21, 2014) | |

@Mithun said the formula (x)y.(x)m = (x)y+m. But in the second step when value are put then m is not write in the place after 17Ã-8 why? |

David Wainaina said: (Jan 29, 2015) | |

Simple maths you just do 8-3.5 = 4.5. |

Krishnalal Reang said: (Aug 27, 2015) | |

I want with explanation and simple solution. |

Ayovin said: (Nov 14, 2016) | |

Simple 8 - 3.5 = 4.5. |

Y.mamaki said: (Feb 18, 2017) | |

=17^3.5 * 17^*=17^8. =17^3.5* * =17^8. =17*= 17^8-3.5. =17*= 4.5. Answer =4.5. |

Rishikesh Agrawani said: (Jul 23, 2017) | |

Just look at the below simple derivation. a.a.a.......m times = a^m, a.a.a.......n times. = a^n, (a.a.a.......m times).(a.a.a.......n times) = a.a.a......m+n times = a^(m+n). Now we got, a^m . a^n = a^(m+n). Applying the above formula to the given question, 17^3.5 . 17^x = 17^8, 17^(3.5+x) = 17^8, 3.5 + x = 8, x = 4.5. |

Harry said: (May 10, 2018) | |

Please explain the calculation of 17^3.5. |

Vijay said: (Jan 21, 2022) | |

Yes, A^m * A^n = A^m+n. |

Glory said: (May 14, 2022) | |

Thanks everyone. |

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