## Class/Course - Class XI

### Subject - Math

#### Chapter - Sets

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Q.1 Let φ(x) = $\frac{b\left (x - a \right )}{b - a} + \frac{a\left (x - b \right )}{a - b}$, where x ε R and a and b are fixed real numbers with a ≠ b. Then φ(a + b) is equal to | |

φ(ab) | |

φ(-ab) | |

φ(a) + φ(b) | |

φ(a - b) | |

φ(0) | |